Damage rework (#2525)

* Make damage work through messages and events, make destructible not inherit ruinable or reference damageable

* Copy sound logic to destructible component for now

* Fix typo

* Fix prototype error

* Remove breakable component damageable reference

* Remove breakable construction reference

* Remove ruinable component

* Move thresholds to individual components and away from damageable

* Add threshold property to damageable component code

* Add thresholds to destructible component, add states to damageable, remove damage container, fix up mob states

* Being alive isn't normal

* Fix not reading the id

* Merge fixes

* YAML fixes

* Grammar moment

* Remove unnecessary dependency

* Update thresholds doc

* Change naming of thresholds to states in MobStateComponent

* Being alive is once again normal

* Make DamageState a byte

* Bring out classes structs and enums from DestructibleComponent

* Add test for destructible thresholds

* Merge fixes

* More merge fixes and fix rejuvenate test

* Remove IMobState.IsConscious

* More merge fixes someone please god review this shit already

* Fix rejuvenate test

* Update outdated destructible in YAML

* Fix repeatedly entering the current state

* Fix repeatedly entering the current state, add Threshold.TriggersOnce and expand test

* Update saltern

Content.Client/GameObjects/Components/Body/Scanner/BodyScannerDisplay.cs

@@ -144,11 +144,10 @@ namespace Content.Client.GameObjects.Components.Body.Scanner
         {
             BodyPartLabel.Text = $"{Loc.GetString(slotName)}: {Loc.GetString(part.Owner.Name)}";
 
-            // TODO BODY Make dead not be the destroy threshold for a body part
+            // TODO BODY Part damage
-            if (part.Owner.TryGetComponent(out IDamageableComponent? damageable) &&
+            if (part.Owner.TryGetComponent(out IDamageableComponent? damageable))
-                damageable.TryHealth(DamageState.Critical, out var health))
             {
-                BodyPartHealth.Text = $"{health.current} / {health.max}";
+                BodyPartHealth.Text = Loc.GetString("{0} damage", damageable.TotalDamage);
             }
 
             MechanismList.Clear();

Content.Client/GameObjects/Components/Kitchen/ReagentGrinderBoundUserInterface.cs

@@ -22,8 +22,8 @@ namespace Content.Client.GameObjects.Components.Kitchen
         [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
 
         private GrinderMenu _menu;
-        private Dictionary<int, EntityUid> _chamberVisualContents = new Dictionary<int, EntityUid>();
+        private Dictionary<int, EntityUid> _chamberVisualContents = new();
-        private Dictionary<int, Solution.ReagentQuantity> _beakerVisualContents = new Dictionary<int, Solution.ReagentQuantity>();
+        private Dictionary<int, Solution.ReagentQuantity> _beakerVisualContents = new();
         public ReagentGrinderBoundUserInterface(ClientUserInterfaceComponent owner, object uiKey) : base(owner, uiKey) { }
 
         protected override void Open()

Content.Client/GameObjects/Components/Mobs/State/CriticalMobState.cs

@@ -0,0 +1,8 @@
+using Content.Shared.GameObjects.Components.Mobs.State;
+
+namespace Content.Client.GameObjects.Components.Mobs.State
+{
+    public class CriticalMobState : SharedCriticalMobState
+    {
+    }
+}

Content.Client/GameObjects/Components/Mobs/State/CriticalState.cs

@@ -1,30 +0,0 @@
-using Content.Client.GameObjects.EntitySystems;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.Components.Mobs;
-using Content.Shared.GameObjects.Components.Mobs.State;
-using Robust.Client.GameObjects;
-using Robust.Shared.GameObjects.Systems;
-using Robust.Shared.Interfaces.GameObjects;
-
-namespace Content.Client.GameObjects.Components.Mobs.State
-{
-    public class CriticalState : SharedCriticalState
-    {
-        public override void EnterState(IEntity entity)
-        {
-            if (entity.TryGetComponent(out AppearanceComponent appearance))
-            {
-                appearance.SetData(DamageStateVisuals.State, DamageState.Critical);
-            }
-
-            EntitySystem.Get<StandingStateSystem>().Down(entity);
-        }
-
-        public override void ExitState(IEntity entity)
-        {
-            EntitySystem.Get<StandingStateSystem>().Standing(entity);
-        }
-
-        public override void UpdateState(IEntity entity) { }
-    }
-}

Content.Client/GameObjects/Components/Mobs/State/DeadMobState.cs

@@ -1,5 +1,4 @@
 using Content.Client.GameObjects.EntitySystems;
-using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Mobs;
 using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Client.GameObjects;
@@ -9,10 +8,12 @@ using Robust.Shared.Interfaces.GameObjects;
 
 namespace Content.Client.GameObjects.Components.Mobs.State
 {
-    public class DeadState : SharedDeadState
+    public class DeadMobState : SharedDeadMobState
     {
         public override void EnterState(IEntity entity)
         {
+            base.EnterState(entity);
+
             if (entity.TryGetComponent(out AppearanceComponent appearance))
             {
                 appearance.SetData(DamageStateVisuals.State, DamageState.Dead);
@@ -28,6 +29,8 @@ namespace Content.Client.GameObjects.Components.Mobs.State
 
         public override void ExitState(IEntity entity)
         {
+            base.ExitState(entity);
+
             EntitySystem.Get<StandingStateSystem>().Standing(entity);
 
             if (entity.TryGetComponent(out PhysicsComponent physics))
@@ -35,7 +38,5 @@ namespace Content.Client.GameObjects.Components.Mobs.State
                 physics.CanCollide = true;
             }
         }
-
-        public override void UpdateState(IEntity entity) { }
     }
 }

Content.Client/GameObjects/Components/Mobs/State/MobStateComponent.cs

@@ -0,0 +1,13 @@
+#nullable enable
+using Content.Shared.GameObjects.Components.Mobs.State;
+using Robust.Shared.GameObjects;
+
+namespace Content.Client.GameObjects.Components.Mobs.State
+{
+    [RegisterComponent]
+    [ComponentReference(typeof(SharedMobStateComponent))]
+    [ComponentReference(typeof(IMobStateComponent))]
+    public class MobStateComponent : SharedMobStateComponent
+    {
+    }
+}

Content.Client/GameObjects/Components/Mobs/State/MobStateManagerComponent.cs

@@ -1,62 +0,0 @@
-#nullable enable
-using System.Collections.Generic;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.Components.Mobs.State;
-using Robust.Shared.GameObjects;
-
-namespace Content.Client.GameObjects.Components.Mobs.State
-{
-    [RegisterComponent]
-    [ComponentReference(typeof(SharedMobStateManagerComponent))]
-    public class MobStateManagerComponent : SharedMobStateManagerComponent
-    {
-        private readonly Dictionary<DamageState, IMobState> _behavior = new()
-        {
-            {DamageState.Alive, new NormalState()},
-            {DamageState.Critical, new CriticalState()},
-            {DamageState.Dead, new DeadState()}
-        };
-
-        private DamageState _currentDamageState;
-
-        protected override IReadOnlyDictionary<DamageState, IMobState> Behavior => _behavior;
-
-        public override DamageState CurrentDamageState
-        {
-            get => _currentDamageState;
-            protected set
-            {
-                if (_currentDamageState == value)
-                {
-                    return;
-                }
-
-                if (_currentDamageState != DamageState.Invalid)
-                {
-                    CurrentMobState.ExitState(Owner);
-                }
-
-                _currentDamageState = value;
-                CurrentMobState = Behavior[CurrentDamageState];
-                CurrentMobState.EnterState(Owner);
-
-                Dirty();
-            }
-        }
-
-        public override void HandleComponentState(ComponentState? curState, ComponentState? nextState)
-        {
-            base.HandleComponentState(curState, nextState);
-
-            if (curState is not MobStateManagerComponentState state)
-            {
-                return;
-            }
-
-            _currentDamageState = state.DamageState;
-            CurrentMobState?.ExitState(Owner);
-            CurrentMobState = Behavior[CurrentDamageState];
-            CurrentMobState.EnterState(Owner);
-        }
-    }
-}

Content.Client/GameObjects/Components/Mobs/State/NormalMobState.cs

@@ -1,25 +1,20 @@
-using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs;
-using Content.Shared.GameObjects.Components.Mobs;
 using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Client.GameObjects;
 using Robust.Shared.Interfaces.GameObjects;
 
 namespace Content.Client.GameObjects.Components.Mobs.State
 {
-    public class NormalState : SharedNormalState
+    public class NormalMobState : SharedNormalMobState
     {
         public override void EnterState(IEntity entity)
         {
+            base.EnterState(entity);
+
             if (entity.TryGetComponent(out AppearanceComponent appearance))
             {
                 appearance.SetData(DamageStateVisuals.State, DamageState.Alive);
             }
-
-            UpdateState(entity);
         }
-
-        public override void ExitState(IEntity entity) { }
-
-        public override void UpdateState(IEntity entity) { }
     }
 }

Content.IntegrationTests/Tests/Commands/RejuvenateTest.cs

@@ -2,6 +2,7 @@
 using Content.Server.GlobalVerbs;
 using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using NUnit.Framework;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Interfaces.Map;
@@ -14,7 +15,7 @@ namespace Content.IntegrationTests.Tests.Commands
     [TestOf(typeof(RejuvenateVerb))]
     public class RejuvenateTest : ContentIntegrationTest
     {
-        private const string PROTOTYPES = @"
+        private const string Prototypes = @"
 - type: entity
   name: DamageableDummy
   id: DamageableDummy
@@ -23,12 +24,17 @@ namespace Content.IntegrationTests.Tests.Commands
     damagePrototype: biologicalDamageContainer
     criticalThreshold: 100
     deadThreshold: 200
+  - type: MobState
+    thresholds:
+      0: !type:NormalMobState {}
+      100: !type:CriticalMobState {}
+      200: !type:DeadMobState {}
 ";
 
         [Test]
         public async Task RejuvenateDeadTest()
         {
-            var options = new ServerIntegrationOptions{ExtraPrototypes = PROTOTYPES};
+            var options = new ServerIntegrationOptions{ExtraPrototypes = Prototypes};
             var server = StartServerDummyTicker(options);
 
             await server.WaitAssertion(() =>
@@ -43,19 +49,30 @@ namespace Content.IntegrationTests.Tests.Commands
 
                 // Sanity check
                 Assert.True(human.TryGetComponent(out IDamageableComponent damageable));
-                Assert.That(damageable.CurrentState, Is.EqualTo(DamageState.Alive));
+                Assert.True(human.TryGetComponent(out IMobStateComponent mobState));
+                Assert.That(mobState.IsAlive, Is.True);
+                Assert.That(mobState.IsCritical, Is.False);
+                Assert.That(mobState.IsDead, Is.False);
+                Assert.That(mobState.IsIncapacitated, Is.False);
 
                 // Kill the entity
                 damageable.ChangeDamage(DamageClass.Brute, 10000000, true);
 
                 // Check that it is dead
-                Assert.That(damageable.CurrentState, Is.EqualTo(DamageState.Dead));
+                Assert.That(mobState.IsAlive, Is.False);
+                Assert.That(mobState.IsCritical, Is.False);
+                Assert.That(mobState.IsDead, Is.True);
+                Assert.That(mobState.IsIncapacitated, Is.True);
 
                 // Rejuvenate them
                 RejuvenateVerb.PerformRejuvenate(human);
 
                 // Check that it is alive and with no damage
-                Assert.That(damageable.CurrentState, Is.EqualTo(DamageState.Alive));
+                Assert.That(mobState.IsAlive, Is.True);
+                Assert.That(mobState.IsCritical, Is.False);
+                Assert.That(mobState.IsDead, Is.False);
+                Assert.That(mobState.IsIncapacitated, Is.False);
+
                 Assert.That(damageable.TotalDamage, Is.Zero);
             });
         }

Content.IntegrationTests/Tests/Destructible/DestructibleTests.cs

@@ -0,0 +1,294 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Content.Server.GameObjects.Components.Destructible;
+using Content.Shared.Damage;
+using Content.Shared.GameObjects.Components.Damage;
+using NUnit.Framework;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Map;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+
+namespace Content.IntegrationTests.Tests.Destructible
+{
+    [TestFixture]
+    [TestOf(typeof(DestructibleComponent))]
+    [TestOf(typeof(Threshold))]
+    public class DestructibleTests : ContentIntegrationTest
+    {
+        private static readonly string DestructibleEntityId = "DestructibleTestsDestructibleEntity";
+
+        private static readonly string Prototypes = $@"
+- type: entity
+  id: {DestructibleEntityId}
+  name: {DestructibleEntityId}
+  components:
+  - type: Damageable
+  - type: Destructible
+    thresholds:
+      20:
+        TriggersOnce: false
+      50:
+        Sound: /Audio/Effects/woodhit.ogg
+        Spawn:
+          WoodPlank:
+            Min: 1
+            Max: 1
+        Acts: [""Breakage""]
+        TriggersOnce: false
+  - type: TestThresholdListener
+";
+
+        private class TestThresholdListenerComponent : Component
+        {
+            public override string Name => "TestThresholdListener";
+
+            public List<DestructibleThresholdReachedMessage> ThresholdsReached { get; } = new();
+
+            public override void HandleMessage(ComponentMessage message, IComponent component)
+            {
+                base.HandleMessage(message, component);
+
+                switch (message)
+                {
+                    case DestructibleThresholdReachedMessage msg:
+                        ThresholdsReached.Add(msg);
+                        break;
+                }
+            }
+        }
+
+        [Test]
+        public async Task TestThresholdActivation()
+        {
+            var server = StartServerDummyTicker(new ServerContentIntegrationOption
+            {
+                ExtraPrototypes = Prototypes,
+                ContentBeforeIoC = () =>
+                {
+                    IoCManager.Resolve<IComponentFactory>().Register<TestThresholdListenerComponent>();
+                }
+            });
+
+            await server.WaitIdleAsync();
+
+            var sEntityManager = server.ResolveDependency<IEntityManager>();
+            var sMapManager = server.ResolveDependency<IMapManager>();
+
+            IEntity sDestructibleEntity = null;
+            IDamageableComponent sDamageableComponent = null;
+            DestructibleComponent sDestructibleComponent = null;
+            TestThresholdListenerComponent sThresholdListenerComponent = null;
+
+            await server.WaitPost(() =>
+            {
+                var mapId = new MapId(1);
+                var coordinates = new MapCoordinates(0, 0, mapId);
+                sMapManager.CreateMap(mapId);
+
+                sDestructibleEntity = sEntityManager.SpawnEntity(DestructibleEntityId, coordinates);
+                sDamageableComponent = sDestructibleEntity.GetComponent<IDamageableComponent>();
+                sDestructibleComponent = sDestructibleEntity.GetComponent<DestructibleComponent>();
+                sThresholdListenerComponent = sDestructibleEntity.GetComponent<TestThresholdListenerComponent>();
+            });
+
+            await server.WaitRunTicks(5);
+
+            await server.WaitAssertion(() =>
+            {
+                Assert.That(sThresholdListenerComponent.ThresholdsReached.Count, Is.Zero);
+            });
+
+            await server.WaitAssertion(() =>
+            {
+                Assert.True(sDamageableComponent.ChangeDamage(DamageType.Blunt, 10, true));
+
+                // No thresholds reached yet, the earliest one is at 20 damage
+                Assert.That(sThresholdListenerComponent.ThresholdsReached.Count, Is.Zero);
+
+                Assert.True(sDamageableComponent.ChangeDamage(DamageType.Blunt, 10, true));
+
+                // Only one threshold reached, 20
+                Assert.That(sThresholdListenerComponent.ThresholdsReached.Count, Is.EqualTo(1));
+
+                var msg = sThresholdListenerComponent.ThresholdsReached[0];
+
+                // Check that it matches the total damage dealt
+                Assert.That(msg.TotalDamage, Is.EqualTo(20));
+
+                var threshold = msg.Threshold;
+
+                // Check that it matches the YAML prototype
+                Assert.That(threshold.Acts, Is.EqualTo(0));
+                Assert.That(threshold.Sound, Is.Null.Or.Empty);
+                Assert.That(threshold.Spawn, Is.Null);
+                Assert.That(threshold.SoundCollection, Is.Null.Or.Empty);
+                Assert.That(threshold.Triggered, Is.True);
+
+                sThresholdListenerComponent.ThresholdsReached.Clear();
+
+                Assert.True(sDamageableComponent.ChangeDamage(DamageType.Blunt, 30, true));
+
+                // Only one threshold reached, 50, since 20 was already reached before
+                Assert.That(sThresholdListenerComponent.ThresholdsReached.Count, Is.EqualTo(1));
+
+                msg = sThresholdListenerComponent.ThresholdsReached[0];
+
+                // Check that it matches the total damage dealt
+                Assert.That(msg.TotalDamage, Is.EqualTo(50));
+
+                threshold = msg.Threshold;
+
+                // Check that it matches the YAML prototype
+                Assert.That(threshold.Acts, Is.EqualTo((int) ThresholdActs.Breakage));
+                Assert.That(threshold.Sound, Is.EqualTo("/Audio/Effects/woodhit.ogg"));
+                Assert.That(threshold.Spawn, Is.Not.Null);
+                Assert.That(threshold.Spawn.Count, Is.EqualTo(1));
+                Assert.That(threshold.Spawn.Single().Key, Is.EqualTo("WoodPlank"));
+                Assert.That(threshold.Spawn.Single().Value.Min, Is.EqualTo(1));
+                Assert.That(threshold.Spawn.Single().Value.Max, Is.EqualTo(1));
+                Assert.That(threshold.SoundCollection, Is.Null.Or.Empty);
+                Assert.That(threshold.Triggered, Is.True);
+
+                sThresholdListenerComponent.ThresholdsReached.Clear();
+
+                // Damage for 50 again, up to 100 now
+                Assert.True(sDamageableComponent.ChangeDamage(DamageType.Blunt, 50, true));
+
+                // No new thresholds reached as even though they don't only trigger once, the entity was not healed below the threshold
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Is.Empty);
+
+                // Heal the entity for 40 damage, down to 60
+                sDamageableComponent.ChangeDamage(DamageType.Blunt, -40, true);
+
+                // Thresholds don't work backwards
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Is.Empty);
+
+                // Damage for 10, up to 70
+                sDamageableComponent.ChangeDamage(DamageType.Blunt, 10, true);
+
+                // Not enough healing to de-trigger a threshold
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Is.Empty);
+
+                // Heal by 30, down to 40
+                sDamageableComponent.ChangeDamage(DamageType.Blunt, -30, true);
+
+                // Thresholds don't work backwards
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Is.Empty);
+
+                // Damage up to 50 again
+                sDamageableComponent.ChangeDamage(DamageType.Blunt, 10, true);
+
+                // The 50 threshold should have triggered again, after being healed
+                Assert.That(sThresholdListenerComponent.ThresholdsReached.Count, Is.EqualTo(1));
+
+                msg = sThresholdListenerComponent.ThresholdsReached[0];
+
+                // Check that it matches the total damage dealt
+                Assert.That(msg.TotalDamage, Is.EqualTo(50));
+
+                threshold = msg.Threshold;
+
+                // Check that it matches the YAML prototype
+                Assert.That(threshold.Acts, Is.EqualTo((int) ThresholdActs.Breakage));
+                Assert.That(threshold.Sound, Is.EqualTo("/Audio/Effects/woodhit.ogg"));
+                Assert.That(threshold.Spawn, Is.Not.Null);
+                Assert.That(threshold.Spawn.Count, Is.EqualTo(1));
+                Assert.That(threshold.Spawn.Single().Key, Is.EqualTo("WoodPlank"));
+                Assert.That(threshold.Spawn.Single().Value.Min, Is.EqualTo(1));
+                Assert.That(threshold.Spawn.Single().Value.Max, Is.EqualTo(1));
+                Assert.That(threshold.SoundCollection, Is.Null.Or.Empty);
+                Assert.That(threshold.Triggered, Is.True);
+
+                // Reset thresholds reached
+                sThresholdListenerComponent.ThresholdsReached.Clear();
+
+                // Heal all damage
+                sDamageableComponent.Heal();
+
+                // Damage up to 50
+                sDamageableComponent.ChangeDamage(DamageType.Blunt, 50, true);
+
+                // Check that the total damage matches
+                Assert.That(sDamageableComponent.TotalDamage, Is.EqualTo(50));
+
+                // Both thresholds should have triggered
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Has.Exactly(2).Items);
+
+                // Verify the first one, should be the lowest one (20)
+                msg = sThresholdListenerComponent.ThresholdsReached[0];
+                Assert.That(msg.ThresholdAmount, Is.EqualTo(20));
+
+                // The total damage should be 50
+                Assert.That(msg.TotalDamage, Is.EqualTo(50));
+
+                threshold = msg.Threshold;
+
+                // Check that it matches the YAML prototype
+                Assert.That(threshold.Acts, Is.EqualTo(0));
+                Assert.That(threshold.Sound, Is.Null.Or.Empty);
+                Assert.That(threshold.Spawn, Is.Null);
+                Assert.That(threshold.SoundCollection, Is.Null.Or.Empty);
+                Assert.That(threshold.Triggered, Is.True);
+
+                // Verify the second one, should be the highest one (50)
+                msg = sThresholdListenerComponent.ThresholdsReached[1];
+                Assert.That(msg.ThresholdAmount, Is.EqualTo(50));
+
+                // Check that it matches the total damage dealt
+                Assert.That(msg.TotalDamage, Is.EqualTo(50));
+
+                threshold = msg.Threshold;
+
+                // Check that it matches the YAML prototype
+                Assert.That(threshold.Acts, Is.EqualTo((int) ThresholdActs.Breakage));
+                Assert.That(threshold.Sound, Is.EqualTo("/Audio/Effects/woodhit.ogg"));
+                Assert.That(threshold.Spawn, Is.Not.Null);
+                Assert.That(threshold.Spawn.Count, Is.EqualTo(1));
+                Assert.That(threshold.Spawn.Single().Key, Is.EqualTo("WoodPlank"));
+                Assert.That(threshold.Spawn.Single().Value.Min, Is.EqualTo(1));
+                Assert.That(threshold.Spawn.Single().Value.Max, Is.EqualTo(1));
+                Assert.That(threshold.SoundCollection, Is.Null.Or.Empty);
+                Assert.That(threshold.Triggered, Is.True);
+
+                // Reset thresholds reached
+                sThresholdListenerComponent.ThresholdsReached.Clear();
+
+                // Heal the entity completely
+                sDamageableComponent.Heal();
+
+                // Check that the entity has 0 damage
+                Assert.That(sDamageableComponent.TotalDamage, Is.EqualTo(0));
+
+                // Set both thresholds to only trigger once
+                foreach (var destructibleThreshold in sDestructibleComponent.LowestToHighestThresholds.Values)
+                {
+                    destructibleThreshold.TriggersOnce = true;
+                }
+
+                // Damage the entity up to 50 damage again
+                sDamageableComponent.ChangeDamage(DamageType.Blunt, 50, true);
+
+                // Check that the total damage matches
+                Assert.That(sDamageableComponent.TotalDamage, Is.EqualTo(50));
+
+                // No thresholds should have triggered as they were already triggered before, and they are set to only trigger once
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Is.Empty);
+
+                // Set both thresholds to trigger multiple times
+                foreach (var destructibleThreshold in sDestructibleComponent.LowestToHighestThresholds.Values)
+                {
+                    destructibleThreshold.TriggersOnce = false;
+                }
+
+                // Check that the total damage matches
+                Assert.That(sDamageableComponent.TotalDamage, Is.EqualTo(50));
+
+                // They shouldn't have been triggered by changing TriggersOnce
+                Assert.That(sThresholdListenerComponent.ThresholdsReached, Is.Empty);
+            });
+        }
+    }
+}

Content.Server/AI/Utility/AiLogic/UtilityAI.cs

@@ -10,6 +10,7 @@ using Content.Server.GameObjects.EntitySystems.AI;
 using Content.Server.GameObjects.EntitySystems.AI.LoadBalancer;
 using Content.Server.GameObjects.EntitySystems.JobQueues;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Server.AI;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Systems;
@@ -130,28 +131,18 @@ namespace Content.Server.AI.Utility.AiLogic
             _planCooldownRemaining = PlanCooldown;
             _blackboard = new Blackboard(SelfEntity);
             _planner = IoCManager.Resolve<IEntitySystemManager>().GetEntitySystem<AiActionSystem>();
-            if (SelfEntity.TryGetComponent(out IDamageableComponent damageableComponent))
-            {
-                damageableComponent.HealthChangedEvent += DeathHandle;
-            }
         }
 
         public override void Shutdown()
         {
-            // TODO: If DamageableComponent removed still need to unsubscribe?
-            if (SelfEntity.TryGetComponent(out IDamageableComponent damageableComponent))
-            {
-                damageableComponent.HealthChangedEvent -= DeathHandle;
-            }
-
             var currentOp = CurrentAction?.ActionOperators.Peek();
             currentOp?.Shutdown(Outcome.Failed);
         }
 
-        private void DeathHandle(HealthChangedEventArgs eventArgs)
+        public void MobStateChanged(MobStateChangedMessage message)
         {
             var oldDeadState = _isDead;
-            _isDead = eventArgs.Damageable.CurrentState == DamageState.Dead || eventArgs.Damageable.CurrentState == DamageState.Critical;
+            _isDead = message.Component.IsIncapacitated();
 
             if (oldDeadState != _isDead)
             {

Content.Server/AI/Utility/Considerations/Combat/TargetIsCritCon.cs

@@ -1,6 +1,7 @@
 using Content.Server.AI.WorldState;
 using Content.Server.AI.WorldState.States;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 
 namespace Content.Server.AI.Utility.Considerations.Combat
 {
@@ -10,12 +11,12 @@ namespace Content.Server.AI.Utility.Considerations.Combat
         {
             var target = context.GetState<TargetEntityState>().GetValue();
 
-            if (target == null || !target.TryGetComponent(out IDamageableComponent damageableComponent))
+            if (target == null || !target.TryGetComponent(out IMobStateComponent mobState))
             {
                 return 0.0f;
             }
 
-            if (damageableComponent.CurrentState == DamageState.Critical)
+            if (mobState.IsCritical())
             {
                 return 1.0f;
             }

Content.Server/AI/Utility/Considerations/Combat/TargetIsDeadCon.cs

@@ -1,6 +1,7 @@
 using Content.Server.AI.WorldState;
 using Content.Server.AI.WorldState.States;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 
 namespace Content.Server.AI.Utility.Considerations.Combat
 {
@@ -10,12 +11,12 @@ namespace Content.Server.AI.Utility.Considerations.Combat
         {
             var target = context.GetState<TargetEntityState>().GetValue();
 
-            if (target == null || !target.TryGetComponent(out IDamageableComponent damageableComponent))
+            if (target == null || !target.TryGetComponent(out IMobStateComponent mobState))
             {
                 return 0.0f;
             }
 
-            if (damageableComponent.CurrentState == DamageState.Dead)
+            if (mobState.IsDead())
             {
                 return 1.0f;
             }

Content.Server/Commands/Observer/Ghost.cs

@@ -1,4 +1,5 @@
-using Content.Server.Administration;
+#nullable enable
+using Content.Server.Administration;
 using Content.Server.GameObjects.Components.Mobs;
 using Content.Server.GameObjects.Components.Observer;
 using Content.Server.Interfaces.GameTicking;
@@ -6,6 +7,7 @@ using Content.Server.Players;
 using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Server.Interfaces.Console;
 using Robust.Server.Interfaces.Player;
 using Robust.Shared.Interfaces.GameObjects;
@@ -21,25 +23,25 @@ namespace Content.Server.Commands.Observer
         public string Help => "ghost";
         public bool CanReturn { get; set; } = true;
 
-        public void Execute(IConsoleShell shell, IPlayerSession player, string[] args)
+        public void Execute(IConsoleShell shell, IPlayerSession? player, string[] args)
         {
             if (player == null)
             {
-                shell.SendText((IPlayerSession) null, "Nah");
+                shell.SendText(player, "Nah");
                 return;
             }
 
-            var mind = player.ContentData().Mind;
+            var mind = player.ContentData()?.Mind;
+
             if (mind == null)
             {
                 shell.SendText(player, "You can't ghost here!");
                 return;
             }
 
-            var canReturn = player.AttachedEntity != null && CanReturn;
+            var playerEntity = player.AttachedEntity;
-            var name = player.AttachedEntity?.Name ?? player.Name;
 
-            if (player.AttachedEntity != null && player.AttachedEntity.HasComponent<GhostComponent>())
+            if (playerEntity != null && playerEntity.HasComponent<GhostComponent>())
                 return;
 
             if (mind.VisitingEntity != null)
@@ -48,22 +50,28 @@ namespace Content.Server.Commands.Observer
                 mind.VisitingEntity.Delete();
             }
 
-            var position = player.AttachedEntity?.Transform.Coordinates ?? IoCManager.Resolve<IGameTicker>().GetObserverSpawnPoint();
+            var position = playerEntity?.Transform.Coordinates ?? IoCManager.Resolve<IGameTicker>().GetObserverSpawnPoint();
+            var canReturn = false;
 
-            if (canReturn && player.AttachedEntity.TryGetComponent(out IDamageableComponent damageable))
+            if (playerEntity != null && CanReturn && playerEntity.TryGetComponent(out IMobStateComponent? mobState))
             {
-                switch (damageable.CurrentState)
+                if (mobState.IsDead())
                 {
-                    case DamageState.Dead:
+                    canReturn = true;
-                        canReturn = true;
+                }
-                        break;
+                else if (mobState.IsCritical())
-                    case DamageState.Critical:
+                {
-                        canReturn = true;
+                    canReturn = true;
-                        damageable.ChangeDamage(DamageType.Asphyxiation, 100, true, null); //todo: what if they dont breathe lol
+
-                        break;
+                    if (playerEntity.TryGetComponent(out IDamageableComponent? damageable))
-                    default:
+                    {
-                        canReturn = false;
+                        //todo: what if they dont breathe lol
-                        break;
+                        damageable.ChangeDamage(DamageType.Asphyxiation, 100, true);
+                    }
+                }
+                else
+                {
+                    canReturn = false;
                 }
             }
 
@@ -74,9 +82,10 @@ namespace Content.Server.Commands.Observer
             var ghostComponent = ghost.GetComponent<GhostComponent>();
             ghostComponent.CanReturnToBody = canReturn;
 
-            if (player.AttachedEntity.TryGetComponent(out ServerOverlayEffectsComponent overlayComponent))
+            if (playerEntity != null &&
+                playerEntity.TryGetComponent(out ServerOverlayEffectsComponent? overlayComponent))
             {
-                overlayComponent?.RemoveOverlay(SharedOverlayID.CircleMaskOverlay);
+                overlayComponent.RemoveOverlay(SharedOverlayID.CircleMaskOverlay);
             }
 
             if (canReturn)

Content.Server/GameObjects/Components/Body/BodyComponent.cs

@@ -1,12 +1,16 @@
 #nullable enable
+using System;
 using Content.Server.Commands.Observer;
 using Content.Shared.GameObjects.Components.Body;
 using Content.Shared.GameObjects.Components.Body.Part;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.Components.Movement;
 using Robust.Server.GameObjects.Components.Container;
+using Robust.Server.Interfaces.Console;
 using Robust.Server.Interfaces.Player;
 using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
 using Robust.Shared.Log;
 using Robust.Shared.Players;
 
@@ -76,10 +80,12 @@ namespace Content.Server.GameObjects.Components.Body
 
         void IRelayMoveInput.MoveInputPressed(ICommonSession session)
         {
-            if (Owner.TryGetComponent(out IDamageableComponent? damageable) &&
+            if (Owner.TryGetComponent(out IMobStateComponent? mobState) &&
-                damageable.CurrentState == DamageState.Dead)
+                mobState.IsDead())
             {
-                new Ghost().Execute(null, (IPlayerSession) session, null);
+                var shell = IoCManager.Resolve<IConsoleShell>();
+
+                new Ghost().Execute(shell, (IPlayerSession) session, Array.Empty<string>());
             }
         }
     }

Content.Server/GameObjects/Components/Body/BodyManagerHealthChangeParams.cs

@@ -8,9 +8,9 @@ namespace Content.Server.GameObjects.Components.Body
         BodyPartType Part { get; }
     }
 
-    public class BodyHealthChangeParams : HealthChangeParams, IBodyHealthChangeParams
+    public class BodyDamageChangeParams : DamageChangeParams, IBodyHealthChangeParams
     {
-        public BodyHealthChangeParams(BodyPartType part)
+        public BodyDamageChangeParams(BodyPartType part)
         {
             Part = part;
         }

Content.Server/GameObjects/Components/Buckle/BuckleComponent.cs

@@ -40,7 +40,7 @@ namespace Content.Server.GameObjects.Components.Buckle
         [ComponentDependency] public readonly AppearanceComponent? AppearanceComponent = null;
         [ComponentDependency] private readonly ServerAlertsComponent? _serverAlertsComponent = null;
         [ComponentDependency] private readonly StunnableComponent? _stunnableComponent = null;
-        [ComponentDependency] private readonly MobStateManagerComponent? _mobStateManagerComponent = null;
+        [ComponentDependency] private readonly MobStateComponent? _mobStateComponent = null;
 
         private int _size;
 
@@ -351,7 +351,7 @@ namespace Content.Server.GameObjects.Components.Buckle
                 EntitySystem.Get<StandingStateSystem>().Standing(Owner);
             }
 
-            _mobStateManagerComponent?.CurrentMobState.EnterState(Owner);
+            _mobStateComponent?.CurrentState?.EnterState(Owner);
 
             UpdateBuckleStatus();
 

Content.Server/GameObjects/Components/Damage/BreakableComponent.cs

@@ -1,72 +1,10 @@
-using System.Collections.Generic;
+using Robust.Shared.GameObjects;
-using Content.Shared.Audio;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.EntitySystems;
-using Robust.Server.GameObjects.EntitySystems;
-using Robust.Shared.GameObjects;
-using Robust.Shared.GameObjects.Systems;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.Interfaces.Random;
-using Robust.Shared.IoC;
-using Robust.Shared.Log;
-using Robust.Shared.Random;
 
 namespace Content.Server.GameObjects.Components.Damage
 {
-    // TODO: Repair needs to set CurrentDamageState to DamageState.Alive, but it doesn't exist... should be easy enough if it's just an interface you can slap on BreakableComponent
-
-    /// <summary>
-    ///     When attached to an <see cref="IEntity"/>, allows it to take damage and sets it to a "broken state" after taking
-    ///     enough damage.
-    /// </summary>
     [RegisterComponent]
-    [ComponentReference(typeof(IDamageableComponent))]
+    public class BreakableComponent : Component
-    public class BreakableComponent : RuinableComponent, IExAct
     {
-        [Dependency] private readonly IEntitySystemManager _entitySystemManager = default!;
-        [Dependency] private readonly IRobustRandom _random = default!;
-
         public override string Name => "Breakable";
-
-        private ActSystem _actSystem;
-
-        public override List<DamageState> SupportedDamageStates =>
-            new() {DamageState.Alive, DamageState.Dead};
-
-        void IExAct.OnExplosion(ExplosionEventArgs eventArgs)
-        {
-            switch (eventArgs.Severity)
-            {
-                case ExplosionSeverity.Destruction:
-                case ExplosionSeverity.Heavy:
-                    PerformDestruction();
-                    break;
-                case ExplosionSeverity.Light:
-                    if (_random.Prob(0.5f))
-                    {
-                        PerformDestruction();
-                    }
-
-                    break;
-            }
-        }
-
-        public override void Initialize()
-        {
-            base.Initialize();
-            _actSystem = _entitySystemManager.GetEntitySystem<ActSystem>();
-        }
-
-        // Might want to move this down and have a more standardized method of revival
-        public void FixAllDamage()
-        {
-            Heal();
-            CurrentState = DamageState.Alive;
-        }
-
-        protected override void DestructionBehavior()
-        {
-            _actSystem.HandleBreakage(Owner);
-        }
     }
 }

Content.Server/GameObjects/Components/Damage/BreakableConstructionComponent.cs

@@ -1,7 +1,5 @@
 #nullable enable
-using System;
 using Content.Server.GameObjects.Components.Construction;
-using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.EntitySystems;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Systems;
@@ -10,11 +8,8 @@ using Robust.Shared.Serialization;
 namespace Content.Server.GameObjects.Components.Damage
 {
     [RegisterComponent]
-    [ComponentReference(typeof(IDamageableComponent))]
+    public class BreakableConstructionComponent : Component, IDestroyAct
-    public class BreakableConstructionComponent : RuinableComponent
     {
-        private ActSystem _actSystem = default!;
-
         public override string Name => "BreakableConstruction";
 
         public override void ExposeData(ObjectSerializer serializer)
@@ -24,20 +19,16 @@ namespace Content.Server.GameObjects.Components.Damage
             serializer.DataField(this, x => x.Node, "node", string.Empty);
         }
 
-        public override void Initialize()
-        {
-            base.Initialize();
-
-            _actSystem = EntitySystem.Get<ActSystem>();
-        }
-
         public string Node { get; private set; } = string.Empty;
 
-        protected override async void DestructionBehavior()
+        async void IDestroyAct.OnDestroy(DestructionEventArgs eventArgs)
         {
-            if (Owner.Deleted || !Owner.TryGetComponent(out ConstructionComponent? construction) || string.IsNullOrEmpty(Node)) return;
+            if (Owner.Deleted ||
-
+                !Owner.TryGetComponent(out ConstructionComponent? construction) ||
-            _actSystem.HandleBreakage(Owner);
+                string.IsNullOrEmpty(Node))
+            {
+                return;
+            }
 
             await construction.ChangeNode(Node);
         }

Content.Server/GameObjects/Components/Damage/DestructibleComponent.cs

@@ -1,101 +0,0 @@
-using System.Collections.Generic;
-using Content.Server.GameObjects.Components.Stack;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.EntitySystems;
-using Content.Shared.Utility;
-using Robust.Shared.GameObjects;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.Interfaces.Random;
-using Robust.Shared.IoC;
-using Robust.Shared.Prototypes;
-using Robust.Shared.Serialization;
-
-namespace Content.Server.GameObjects.Components.Damage
-{
-    /// <summary>
-    ///     When attached to an <see cref="IEntity"/>, allows it to take damage and deletes it after taking enough damage.
-    /// </summary>
-    [RegisterComponent]
-    [ComponentReference(typeof(IDamageableComponent))]
-    public class DestructibleComponent : RuinableComponent, IDestroyAct
-    {
-        [Dependency] private readonly IEntitySystemManager _entitySystemManager = default!;
-        [Dependency] private readonly IRobustRandom _random = default!;
-
-        protected ActSystem ActSystem;
-
-        /// <inheritdoc />
-        public override string Name => "Destructible";
-
-        /// <summary>
-        /// Entities spawned on destruction plus the min and max amount spawned.
-        /// </summary>
-        public Dictionary<string, MinMax> SpawnOnDestroy { get; private set; }
-
-        void IDestroyAct.OnDestroy(DestructionEventArgs eventArgs)
-        {
-            if (SpawnOnDestroy == null || !eventArgs.IsSpawnWreck) return;
-            foreach (var (key, value) in SpawnOnDestroy)
-            {
-                int count;
-                if (value.Min >= value.Max)
-                {
-                    count = value.Min;
-                }
-                else
-                {
-                    count = _random.Next(value.Min, value.Max + 1);
-                }
-
-                if (count == 0) continue;
-
-                if (EntityPrototypeHelpers.HasComponent<StackComponent>(key))
-                {
-                    var spawned = Owner.EntityManager.SpawnEntity(key, Owner.Transform.Coordinates);
-                    var stack = spawned.GetComponent<StackComponent>();
-                    stack.Count = count;
-                    spawned.RandomOffset(0.5f);
-                }
-                else
-                {
-                    for (var i = 0; i < count; i++)
-                    {
-                        var spawned = Owner.EntityManager.SpawnEntity(key, Owner.Transform.Coordinates);
-                        spawned.RandomOffset(0.5f);
-                    }
-                }
-            }
-        }
-
-        public override void ExposeData(ObjectSerializer serializer)
-        {
-            base.ExposeData(serializer);
-
-
-            serializer.DataField(this, d => d.SpawnOnDestroy, "spawnOnDestroy", null);
-        }
-
-        public override void Initialize()
-        {
-            base.Initialize();
-            ActSystem = _entitySystemManager.GetEntitySystem<ActSystem>();
-        }
-
-
-        protected override void DestructionBehavior()
-        {
-            if (!Owner.Deleted)
-            {
-                var pos = Owner.Transform.Coordinates;
-                ActSystem.HandleDestruction(Owner,
-                    true); //This will call IDestroyAct.OnDestroy on this component (and all other components on this entity)
-            }
-        }
-
-        public struct MinMax
-        {
-            public int Min;
-            public int Max;
-        }
-    }
-}

Content.Server/GameObjects/Components/Damage/RuinableComponent.cs

@@ -1,104 +0,0 @@
-using System.Collections.Generic;
-using Content.Shared.Audio;
-using Content.Shared.GameObjects.Components.Damage;
-using Robust.Server.GameObjects.EntitySystems;
-using Robust.Shared.GameObjects;
-using Robust.Shared.GameObjects.Systems;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.Interfaces.Random;
-using Robust.Shared.IoC;
-using Robust.Shared.Serialization;
-using Robust.Shared.ViewVariables;
-using Logger = Robust.Shared.Log.Logger;
-
-namespace Content.Server.GameObjects.Components.Damage
-{
-    /// <summary>
-    ///     When attached to an <see cref="IEntity"/>, allows it to take damage and
-    ///     "ruins" or "destroys" it after enough damage is taken.
-    /// </summary>
-    [ComponentReference(typeof(IDamageableComponent))]
-    public abstract class RuinableComponent : DamageableComponent
-    {
-        /// <summary>
-        ///     Sound played upon destruction.
-        /// </summary>
-        [ViewVariables]
-        protected string DestroySound { get; private set; }
-
-        /// <summary>
-        /// Used instead of <see cref="DestroySound"/> if specified.
-        /// </summary>
-        [ViewVariables]
-        protected string DestroySoundCollection { get; private set; }
-
-        public override List<DamageState> SupportedDamageStates =>
-            new() {DamageState.Alive, DamageState.Dead};
-
-        public override void ExposeData(ObjectSerializer serializer)
-        {
-            base.ExposeData(serializer);
-
-            serializer.DataReadWriteFunction(
-                "deadThreshold",
-                100,
-                t =>
-                {
-                    if (t == null)
-                    {
-                        return;
-                    }
-
-                    Thresholds[DamageState.Dead] = t.Value;
-                },
-                () => Thresholds.TryGetValue(DamageState.Dead, out var value) ? value : (int?) null);
-
-            serializer.DataField(this, ruinable => ruinable.DestroySound, "destroySound", string.Empty);
-            serializer.DataField(this, ruinable => ruinable.DestroySoundCollection, "destroySoundCollection", string.Empty);
-        }
-
-        protected override void EnterState(DamageState state)
-        {
-            base.EnterState(state);
-
-            if (state == DamageState.Dead)
-            {
-                PerformDestruction();
-            }
-        }
-
-        /// <summary>
-        ///     Destroys the Owner <see cref="IEntity"/>, setting
-        ///     <see cref="IDamageableComponent.CurrentState"/> to
-        ///     <see cref="Shared.GameObjects.Components.Damage.DamageState.Dead"/>
-        /// </summary>
-        protected void PerformDestruction()
-        {
-            CurrentState = DamageState.Dead;
-
-            if (!Owner.Deleted)
-            {
-                var pos = Owner.Transform.Coordinates;
-                string sound = string.Empty;
-                if (DestroySoundCollection != string.Empty)
-                {
-                    sound = AudioHelpers.GetRandomFileFromSoundCollection(DestroySoundCollection);
-
-                }
-                else if (DestroySound != string.Empty)
-                {
-                    sound = DestroySound;
-                }
-                if (sound != string.Empty)
-                {
-                    Logger.Debug("Playing destruction sound");
-                    EntitySystem.Get<AudioSystem>().PlayAtCoords(sound, pos, AudioHelpers.WithVariation(0.125f));
-                }
-            }
-
-            DestructionBehavior();
-        }
-
-        protected abstract void DestructionBehavior();
-    }
-}

Content.Server/GameObjects/Components/Destructible/ActsFlags.cs

@@ -0,0 +1,4 @@
+namespace Content.Server.GameObjects.Components.Destructible
+{
+    public sealed class ActsFlags { }
+}

Content.Server/GameObjects/Components/Destructible/DestructibleComponent.cs

@@ -0,0 +1,97 @@
+#nullable enable
+using System.Collections.Generic;
+using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.EntitySystems;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Random;
+using Robust.Shared.IoC;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.GameObjects.Components.Destructible
+{
+    /// <summary>
+    ///     When attached to an <see cref="IEntity"/>, allows it to take damage
+    ///     and triggers thresholds when reached.
+    /// </summary>
+    [RegisterComponent]
+    public class DestructibleComponent : Component
+    {
+        [Dependency] private readonly IRobustRandom _random = default!;
+
+        private ActSystem _actSystem = default!;
+
+        public override string Name => "Destructible";
+
+        [ViewVariables]
+        private SortedDictionary<int, Threshold> _lowestToHighestThresholds = new();
+
+        [ViewVariables] private int PreviousTotalDamage { get; set; }
+
+        public IReadOnlyDictionary<int, Threshold> LowestToHighestThresholds => _lowestToHighestThresholds;
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+
+            serializer.DataReadWriteFunction(
+                "thresholds",
+                new Dictionary<int, Threshold>(),
+                thresholds => _lowestToHighestThresholds = new SortedDictionary<int, Threshold>(thresholds),
+                () => new Dictionary<int, Threshold>(_lowestToHighestThresholds));
+        }
+
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            _actSystem = EntitySystem.Get<ActSystem>();
+        }
+
+        public override void HandleMessage(ComponentMessage message, IComponent? component)
+        {
+            base.HandleMessage(message, component);
+
+            switch (message)
+            {
+                case DamageChangedMessage msg:
+                {
+                    if (msg.Damageable.Owner != Owner)
+                    {
+                        break;
+                    }
+
+                    foreach (var (damage, threshold) in _lowestToHighestThresholds)
+                    {
+                        if (threshold.Triggered)
+                        {
+                            if (threshold.TriggersOnce)
+                            {
+                                continue;
+                            }
+
+                            if (PreviousTotalDamage >= damage)
+                            {
+                                continue;
+                            }
+                        }
+
+                        if (msg.Damageable.TotalDamage >= damage)
+                        {
+                            var thresholdMessage = new DestructibleThresholdReachedMessage(this, threshold, msg.Damageable.TotalDamage, damage);
+                            SendMessage(thresholdMessage);
+
+                            threshold.Trigger(Owner, _random, _actSystem);
+                        }
+                    }
+
+                    PreviousTotalDamage = msg.Damageable.TotalDamage;
+
+                    break;
+                }
+            }
+        }
+    }
+}

Content.Server/GameObjects/Components/Destructible/DestructibleThresholdReachedMessage.cs

@@ -0,0 +1,29 @@
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.GameObjects.Components.Destructible
+{
+    public class DestructibleThresholdReachedMessage : ComponentMessage
+    {
+        public DestructibleThresholdReachedMessage(DestructibleComponent parent, Threshold threshold, int totalDamage, int thresholdAmount)
+        {
+            Parent = parent;
+            Threshold = threshold;
+            TotalDamage = totalDamage;
+            ThresholdAmount = thresholdAmount;
+        }
+
+        public DestructibleComponent Parent { get; }
+
+        public Threshold Threshold { get; }
+
+        /// <summary>
+        ///     The amount of total damage currently had that triggered this threshold.
+        /// </summary>
+        public int TotalDamage { get; }
+
+        /// <summary>
+        ///     The amount of damage at which this threshold triggers.
+        /// </summary>
+        public int ThresholdAmount { get; }
+    }
+}

Content.Server/GameObjects/Components/Destructible/MinMax.cs

@@ -0,0 +1,13 @@
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.GameObjects.Components.Destructible
+{
+    public struct MinMax
+    {
+        [ViewVariables]
+        public int Min;
+
+        [ViewVariables]
+        public int Max;
+    }
+}

Content.Server/GameObjects/Components/Destructible/Threshold.cs

@@ -0,0 +1,148 @@
+#nullable enable
+using System.Collections.Generic;
+using Content.Server.GameObjects.Components.Stack;
+using Content.Shared.Audio;
+using Content.Shared.GameObjects.EntitySystems;
+using Content.Shared.Utility;
+using Robust.Server.GameObjects.EntitySystems;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Random;
+using Robust.Shared.Interfaces.Serialization;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Server.GameObjects.Components.Destructible
+{
+    public class Threshold : IExposeData
+    {
+        /// <summary>
+        ///     Entities spawned on reaching this threshold, from a min to a max.
+        /// </summary>
+        [ViewVariables] public Dictionary<string, MinMax>? Spawn;
+
+        /// <summary>
+        ///     Sound played upon destruction.
+        /// </summary>
+        [ViewVariables] public string Sound = string.Empty;
+
+        /// <summary>
+        ///     Used instead of <see cref="Sound"/> if specified.
+        /// </summary>
+        [ViewVariables] public string SoundCollection = string.Empty;
+
+        /// <summary>
+        ///     What acts this threshold should trigger upon activation.
+        ///     See <see cref="ActSystem"/>.
+        /// </summary>
+        [ViewVariables] public int Acts;
+
+        /// <summary>
+        ///     Whether or not this threshold has already been triggered.
+        /// </summary>
+        [ViewVariables] public bool Triggered;
+
+        /// <summary>
+        ///     Whether or not this threshold only triggers once.
+        ///     If false, it will trigger again once the entity is healed
+        ///     and then damaged to reach this threshold once again.
+        ///     It will not repeatedly trigger as damage rises beyond that.
+        /// </summary>
+        [ViewVariables] public bool TriggersOnce;
+
+        public void ExposeData(ObjectSerializer serializer)
+        {
+            serializer.DataField(ref Spawn, "Spawn", null);
+            serializer.DataField(ref Sound, "Sound", string.Empty);
+            serializer.DataField(ref SoundCollection, "SoundCollection", string.Empty);
+            serializer.DataField(ref Acts, "Acts", 0, WithFormat.Flags<ActsFlags>());
+            serializer.DataField(ref Triggered, "Triggered", false);
+            serializer.DataField(ref TriggersOnce, "TriggersOnce", false);
+        }
+
+        /// <summary>
+        ///     Triggers this threshold.
+        /// </summary>
+        /// <param name="owner">The entity that owns this threshold.</param>
+        /// <param name="random">
+        ///     An instance of <see cref="IRobustRandom"/> to get randomness from, if relevant.
+        /// </param>
+        /// <param name="actSystem">
+        ///     An instance of <see cref="ActSystem"/> to call acts on, if relevant.
+        /// </param>
+        public void Trigger(IEntity owner, IRobustRandom random, ActSystem actSystem)
+        {
+            Triggered = true;
+
+            PlaySound(owner);
+            DoSpawn(owner, random);
+            DoActs(owner, actSystem);
+        }
+
+        private void PlaySound(IEntity owner)
+        {
+            var pos = owner.Transform.Coordinates;
+            var actualSound = string.Empty;
+
+            if (SoundCollection != string.Empty)
+            {
+                actualSound = AudioHelpers.GetRandomFileFromSoundCollection(SoundCollection);
+            }
+            else if (Sound != string.Empty)
+            {
+                actualSound = Sound;
+            }
+
+            if (actualSound != string.Empty)
+            {
+                EntitySystem.Get<AudioSystem>().PlayAtCoords(actualSound, pos, AudioHelpers.WithVariation(0.125f));
+            }
+        }
+
+        private void DoSpawn(IEntity owner, IRobustRandom random)
+        {
+            if (Spawn == null)
+            {
+                return;
+            }
+
+            foreach (var (key, value) in Spawn)
+            {
+                var count = value.Min >= value.Max
+                    ? value.Min
+                    : random.Next(value.Min, value.Max + 1);
+
+                if (count == 0) continue;
+
+                if (EntityPrototypeHelpers.HasComponent<StackComponent>(key))
+                {
+                    var spawned = owner.EntityManager.SpawnEntity(key, owner.Transform.Coordinates);
+                    var stack = spawned.GetComponent<StackComponent>();
+                    stack.Count = count;
+                    spawned.RandomOffset(0.5f);
+                }
+                else
+                {
+                    for (var i = 0; i < count; i++)
+                    {
+                        var spawned = owner.EntityManager.SpawnEntity(key, owner.Transform.Coordinates);
+                        spawned.RandomOffset(0.5f);
+                    }
+                }
+            }
+        }
+
+        private void DoActs(IEntity owner, ActSystem acts)
+        {
+            if ((Acts & (int) ThresholdActs.Breakage) != 0)
+            {
+                acts.HandleBreakage(owner);
+            }
+
+            if ((Acts & (int) ThresholdActs.Destruction) != 0)
+            {
+                acts.HandleDestruction(owner);
+            }
+        }
+    }
+}

Content.Server/GameObjects/Components/Destructible/ThresholdActs.cs

@@ -0,0 +1,14 @@
+using System;
+using Robust.Shared.Serialization;
+
+namespace Content.Server.GameObjects.Components.Destructible
+{
+    [Flags, FlagsFor(typeof(ActsFlags))]
+    [Serializable]
+    public enum ThresholdActs
+    {
+        Invalid = 0,
+        Breakage,
+        Destruction
+    }
+}

Content.Server/GameObjects/Components/Disposal/DisposalUnitComponent.cs

@@ -16,6 +16,7 @@ using Content.Shared.GameObjects.Components.Body;
 using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Disposal;
 using Content.Shared.GameObjects.Components.Items;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.EntitySystems;
 using Content.Shared.GameObjects.Verbs;
 using Content.Shared.Interfaces;
@@ -139,11 +140,10 @@ namespace Content.Server.GameObjects.Components.Disposal
                 return false;
             }
 
-
             if (!entity.TryGetComponent(out IPhysicsComponent? physics) ||
                 !physics.CanCollide)
             {
-                if (!(entity.TryGetComponent(out IDamageableComponent? damageState) && damageState.CurrentState == DamageState.Dead)) {
+                if (!(entity.TryGetComponent(out IMobStateComponent? state) && state.IsDead())) {
                     return false;
                 }
             }

Content.Server/GameObjects/Components/Gravity/GravityGeneratorComponent.cs

@@ -4,6 +4,7 @@ using Content.Server.GameObjects.Components.Damage;
 using Content.Server.GameObjects.Components.Interactable;
 using Content.Server.GameObjects.Components.Power.ApcNetComponents;
 using Content.Server.Utility;
+using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Gravity;
 using Content.Shared.GameObjects.Components.Interactable;
 using Content.Shared.GameObjects.EntitySystems;
@@ -108,8 +109,11 @@ namespace Content.Server.GameObjects.Components.Gravity
                 return false;
 
             // Repair generator
-            var breakable = Owner.GetComponent<BreakableComponent>();
+            if (Owner.TryGetComponent(out IDamageableComponent? damageable))
-            breakable.FixAllDamage();
+            {
+                damageable.Heal();
+            }
+
             _intact = true;
 
             Owner.PopupMessage(eventArgs.User,

Content.Server/GameObjects/Components/Medical/CloningPodComponent.cs

@@ -9,6 +9,8 @@ using Content.Server.Mobs;
 using Content.Server.Utility;
 using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Medical;
+using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.Interfaces.GameObjects.Components;
 using Content.Shared.Preferences;
 using Robust.Server.GameObjects;
@@ -163,8 +165,8 @@ namespace Content.Server.GameObjects.Components.Medical
                     }
 
                     var dead =
-                        mind.OwnedEntity.TryGetComponent<IDamageableComponent>(out var damageable) &&
+                        mind.OwnedEntity.TryGetComponent<IMobStateComponent>(out var state) &&
-                        damageable.CurrentState == DamageState.Dead;
+                        state.IsDead();
                     if (!dead) return;
 
 

Content.Server/GameObjects/Components/Medical/MedicalScannerComponent.cs

@@ -11,6 +11,7 @@ using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Body;
 using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Medical;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.EntitySystems;
 using Content.Shared.GameObjects.Verbs;
 using Content.Shared.Interfaces.GameObjects.Components;
@@ -146,14 +147,23 @@ namespace Content.Server.GameObjects.Components.Medical
             UserInterface?.SetState(newState);
         }
 
-        private MedicalScannerStatus GetStatusFromDamageState(DamageState damageState)
+        private MedicalScannerStatus GetStatusFromDamageState(IMobStateComponent state)
         {
-            switch (damageState)
+            if (state.IsAlive())
             {
-                case DamageState.Alive: return MedicalScannerStatus.Green;
+                return MedicalScannerStatus.Green;
-                case DamageState.Critical: return MedicalScannerStatus.Red;
+            }
-                case DamageState.Dead: return MedicalScannerStatus.Death;
+            else if (state.IsCritical())
-                default: throw new ArgumentException(nameof(damageState));
+            {
+                return MedicalScannerStatus.Red;
+            }
+            else if (state.IsDead())
+            {
+                return MedicalScannerStatus.Death;
+            }
+            else
+            {
+                return MedicalScannerStatus.Yellow;
             }
         }
 
@@ -162,9 +172,11 @@ namespace Content.Server.GameObjects.Components.Medical
             if (Powered)
             {
                 var body = _bodyContainer.ContainedEntity;
-                return body == null
+                var state = body?.GetComponentOrNull<IMobStateComponent>();
+
+                return state == null
                     ? MedicalScannerStatus.Open
-                    : GetStatusFromDamageState(body.GetComponent<IDamageableComponent>().CurrentState);
+                    : GetStatusFromDamageState(state);
             }
 
             return MedicalScannerStatus.Off;

Content.Server/GameObjects/Components/Metabolism/MetabolismComponent.cs

@@ -12,6 +12,7 @@ using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Body;
 using Content.Shared.GameObjects.Components.Body.Mechanism;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.EntitySystems;
 using Content.Shared.Interfaces;
 using Content.Shared.Interfaces.Chemistry;
@@ -355,8 +356,8 @@ namespace Content.Server.GameObjects.Components.Metabolism
         /// </param>
         public void Update(float frameTime)
         {
-            if (!Owner.TryGetComponent<IDamageableComponent>(out var damageable) ||
+            if (!Owner.TryGetComponent<IMobStateComponent>(out var state) ||
-                damageable.CurrentState == DamageState.Dead)
+                state.IsDead())
             {
                 return;
             }

Content.Server/GameObjects/Components/Mobs/MindComponent.cs

@@ -6,6 +6,7 @@ using Content.Server.Mobs;
 using Content.Server.Utility;
 using Content.Shared.GameObjects.Components;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.EntitySystems;
 using Robust.Server.GameObjects.Components.UserInterface;
 using Robust.Shared.GameObjects;
@@ -174,8 +175,8 @@ namespace Content.Server.GameObjects.Components.Mobs
             }
 
             var dead =
-                Owner.TryGetComponent<IDamageableComponent>(out var damageable) &&
+                Owner.TryGetComponent<IMobStateComponent>(out var state) &&
-                damageable.CurrentState == DamageState.Dead;
+                state.IsDead();
 
             if (!HasMind)
             {

Content.Server/GameObjects/Components/Mobs/State/CriticalMobState.cs

@@ -9,20 +9,17 @@ using Robust.Shared.Interfaces.GameObjects;
 
 namespace Content.Server.GameObjects.Components.Mobs.State
 {
-    public class CriticalState : SharedCriticalState
+    public class CriticalMobState : SharedCriticalMobState
     {
         public override void EnterState(IEntity entity)
         {
+            base.EnterState(entity);
+
             if (entity.TryGetComponent(out AppearanceComponent appearance))
             {
                 appearance.SetData(DamageStateVisuals.State, DamageState.Critical);
             }
 
-            if (entity.TryGetComponent(out ServerAlertsComponent status))
-            {
-                status.ShowAlert(AlertType.HumanCrit); //Todo: combine humancrit-0 and humancrit-1 into a gif and display it
-            }
-
             if (entity.TryGetComponent(out ServerOverlayEffectsComponent overlay))
             {
                 overlay.AddOverlay(SharedOverlayID.GradientCircleMaskOverlay);
@@ -38,12 +35,12 @@ namespace Content.Server.GameObjects.Components.Mobs.State
 
         public override void ExitState(IEntity entity)
         {
+            base.ExitState(entity);
+
             if (entity.TryGetComponent(out ServerOverlayEffectsComponent overlay))
             {
                 overlay.ClearOverlays();
             }
         }
-
-        public override void UpdateState(IEntity entity) { }
     }
 }

Content.Server/GameObjects/Components/Mobs/State/DeadMobState.cs

@@ -10,10 +10,12 @@ using Robust.Shared.Interfaces.GameObjects;
 
 namespace Content.Server.GameObjects.Components.Mobs.State
 {
-    public class DeadState : SharedDeadState
+    public class DeadMobState : SharedDeadMobState
     {
         public override void EnterState(IEntity entity)
         {
+            base.EnterState(entity);
+
             if (entity.TryGetComponent(out AppearanceComponent appearance))
             {
                 appearance.SetData(DamageStateVisuals.State, DamageState.Dead);
@@ -44,6 +46,8 @@ namespace Content.Server.GameObjects.Components.Mobs.State
 
         public override void ExitState(IEntity entity)
         {
+            base.ExitState(entity);
+
             if (entity.TryGetComponent(out IPhysicsComponent physics))
             {
                 physics.CanCollide = true;
@@ -54,7 +58,5 @@ namespace Content.Server.GameObjects.Components.Mobs.State
                 overlay.ClearOverlays();
             }
         }
-
-        public override void UpdateState(IEntity entity) { }
     }
 }

Content.Server/GameObjects/Components/Mobs/State/MobStateManager.cs

@@ -1,71 +1,22 @@
-using System.Collections.Generic;
+using Content.Shared.GameObjects.Components.Mobs.State;
-using Content.Shared.Alert;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.Components.Mobs;
-using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Shared.GameObjects;
 
 namespace Content.Server.GameObjects.Components.Mobs.State
 {
     [RegisterComponent]
-    [ComponentReference(typeof(SharedMobStateManagerComponent))]
+    [ComponentReference(typeof(SharedMobStateComponent))]
-    public class MobStateManagerComponent : SharedMobStateManagerComponent
+    [ComponentReference(typeof(IMobStateComponent))]
+    public class MobStateComponent : SharedMobStateComponent
     {
-        private readonly Dictionary<DamageState, IMobState> _behavior = new()
-        {
-            {DamageState.Alive, new NormalState()},
-            {DamageState.Critical, new CriticalState()},
-            {DamageState.Dead, new DeadState()}
-        };
-
-        private DamageState _currentDamageState;
-
-        protected override IReadOnlyDictionary<DamageState, IMobState> Behavior => _behavior;
-
-        public override IMobState CurrentMobState { get; protected set; }
-
-        public override DamageState CurrentDamageState
-        {
-            get => _currentDamageState;
-            protected set
-            {
-                if (_currentDamageState == value)
-                {
-                    return;
-                }
-
-                if (_currentDamageState != DamageState.Invalid)
-                {
-                    CurrentMobState.ExitState(Owner);
-                }
-
-                _currentDamageState = value;
-                CurrentMobState = Behavior[CurrentDamageState];
-                CurrentMobState.EnterState(Owner);
-
-                Dirty();
-            }
-        }
-
         public override void OnRemove()
         {
             // TODO: Might want to add an OnRemove() to IMobState since those are where these components are being used
-            base.OnRemove();
-
-            if (Owner.TryGetComponent(out ServerAlertsComponent status))
-            {
-                status.ClearAlert(AlertType.HumanHealth);
-            }
-
             if (Owner.TryGetComponent(out ServerOverlayEffectsComponent overlay))
             {
                 overlay.ClearOverlays();
             }
-        }
 
-        public override ComponentState GetComponentState()
+            base.OnRemove();
-        {
-            return new MobStateManagerComponentState(CurrentDamageState);
         }
     }
 }

Content.Server/GameObjects/Components/Mobs/State/NormalMobState.cs

@@ -0,0 +1,56 @@
+#nullable enable
+using Content.Server.GameObjects.EntitySystems;
+using Content.Shared.Alert;
+using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.Components.Mobs.State;
+using Robust.Server.GameObjects;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+
+namespace Content.Server.GameObjects.Components.Mobs.State
+{
+    public class NormalMobState : SharedNormalMobState
+    {
+        public override void EnterState(IEntity entity)
+        {
+            base.EnterState(entity);
+
+            EntitySystem.Get<StandingStateSystem>().Standing(entity);
+
+            if (entity.TryGetComponent(out AppearanceComponent? appearance))
+            {
+                appearance.SetData(DamageStateVisuals.State, DamageState.Alive);
+            }
+        }
+
+        public override void UpdateState(IEntity entity, int threshold)
+        {
+            base.UpdateState(entity, threshold);
+
+            if (!entity.TryGetComponent(out IDamageableComponent? damageable))
+            {
+                return;
+            }
+
+            if (!entity.TryGetComponent(out ServerAlertsComponent? alerts))
+            {
+                return;
+            }
+
+            if (!entity.TryGetComponent(out IMobStateComponent? stateComponent))
+            {
+                return;
+            }
+
+            short modifier = 0;
+
+            if (stateComponent.TryGetEarliestIncapacitatedState(threshold, out _, out var earliestThreshold))
+            {
+                modifier = (short) (damageable.TotalDamage / (earliestThreshold / 7f));
+            }
+
+            alerts.ShowAlert(AlertType.HumanHealth, modifier);
+        }
+    }
+}

Content.Server/GameObjects/Components/Mobs/State/NormalState.cs

@@ -1,73 +0,0 @@
-using Content.Server.GameObjects.Components.Damage;
-using Content.Server.GameObjects.EntitySystems;
-using Content.Shared.Alert;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.Components.Mobs;
-using Content.Shared.GameObjects.Components.Mobs.State;
-using Robust.Server.GameObjects;
-using Robust.Shared.GameObjects.Systems;
-using Robust.Shared.Interfaces.GameObjects;
-
-namespace Content.Server.GameObjects.Components.Mobs.State
-{
-    public class NormalState : SharedNormalState
-    {
-        public override void EnterState(IEntity entity)
-        {
-            EntitySystem.Get<StandingStateSystem>().Standing(entity);
-
-            if (entity.TryGetComponent(out AppearanceComponent appearance))
-            {
-                appearance.SetData(DamageStateVisuals.State, DamageState.Alive);
-            }
-
-            UpdateState(entity);
-        }
-
-        public override void ExitState(IEntity entity) { }
-
-        public override void UpdateState(IEntity entity)
-        {
-            if (!entity.TryGetComponent(out ServerAlertsComponent status))
-            {
-                return;
-            }
-
-            if (!entity.TryGetComponent(out IDamageableComponent damageable))
-            {
-                status.ShowAlert(AlertType.HumanHealth, 0);
-                return;
-            }
-
-            // TODO
-            switch (damageable)
-            {
-                case RuinableComponent ruinable:
-                {
-                    if (!ruinable.Thresholds.TryGetValue(DamageState.Dead, out var threshold))
-                    {
-                        return;
-                    }
-
-                    var modifier = (short) (ruinable.TotalDamage / (threshold / 7f));
-
-                    status.ShowAlert(AlertType.HumanHealth, modifier);
-
-                    break;
-                }
-                default:
-                {
-                    if (!damageable.Thresholds.TryGetValue(DamageState.Critical, out var threshold))
-                    {
-                        return;
-                    }
-
-                    var modifier = (short) (damageable.TotalDamage / (threshold / 7f));
-
-                    status.ShowAlert(AlertType.HumanHealth, modifier);
-                    break;
-                }
-            }
-        }
-    }
-}

Content.Server/GameObjects/Components/Movement/AiControllerComponent.cs

@@ -1,9 +1,9 @@
 #nullable enable
+using Content.Server.AI.Utility.AiLogic;
 using Content.Server.GameObjects.EntitySystems.AI;
 using Content.Server.Interfaces.GameTicking;
 using Content.Shared.GameObjects.Components.Movement;
 using Content.Shared.Roles;
-using Robust.Server.AI;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Components;
 using Robust.Shared.GameObjects.Systems;
@@ -38,7 +38,7 @@ namespace Content.Server.GameObjects.Components.Movement
             }
         }
 
-        public AiLogicProcessor? Processor { get; set; }
+        public UtilityAi? Processor { get; set; }
 
         [ViewVariables(VVAccess.ReadWrite)]
         public string? StartingGearPrototype { get; set; }

Content.Server/GameObjects/Components/Nutrition/HungerComponent.cs

@@ -4,6 +4,7 @@ using Content.Server.GameObjects.Components.Mobs;
 using Content.Shared.Alert;
 using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.Components.Movement;
 using Content.Shared.GameObjects.Components.Nutrition;
 using Robust.Shared.GameObjects;
@@ -185,15 +186,19 @@ namespace Content.Server.GameObjects.Components.Nutrition
                 HungerThresholdEffect();
                 Dirty();
             }
-            if (_currentHungerThreshold == HungerThreshold.Dead)
+
+            if (_currentHungerThreshold != HungerThreshold.Dead)
+                return;
+
+            if (!Owner.TryGetComponent(out IDamageableComponent damageable))
+                return;
+
+            if (!Owner.TryGetComponent(out IMobStateComponent mobState))
+                return;
+
+            if (!mobState.IsDead())
             {
-                if (Owner.TryGetComponent(out IDamageableComponent damageable))
+                damageable.ChangeDamage(DamageType.Blunt, 2, true);
-                {
-                    if (damageable.CurrentState != DamageState.Dead)
-                    {
-                        damageable.ChangeDamage(DamageType.Blunt, 2, true, null);
-                    }
-                }
             }
         }
 
@@ -209,6 +214,4 @@ namespace Content.Server.GameObjects.Components.Nutrition
             return new HungerComponentState(_currentHungerThreshold);
         }
     }
-
-
 }

Content.Server/GameObjects/Components/Nutrition/ThirstComponent.cs

@@ -5,6 +5,7 @@ using Content.Shared.Alert;
 using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Damage;
 using Content.Shared.GameObjects.Components.Mobs;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.Components.Movement;
 using Content.Shared.GameObjects.Components.Nutrition;
 using Robust.Shared.GameObjects;
@@ -183,19 +184,21 @@ namespace Content.Server.GameObjects.Components.Nutrition
                 Dirty();
             }
 
-            if (_currentThirstThreshold == ThirstThreshold.Dead)
+            if (_currentThirstThreshold != ThirstThreshold.Dead)
+                return;
+
+            if (!Owner.TryGetComponent(out IDamageableComponent damageable))
+                return;
+
+            if (!Owner.TryGetComponent(out IMobStateComponent mobState))
+                return;
+
+            if (!mobState.IsDead())
             {
-                if (Owner.TryGetComponent(out IDamageableComponent damageable))
+                damageable.ChangeDamage(DamageType.Blunt, 2, true);
-                {
-                    if (damageable.CurrentState != DamageState.Dead)
-                    {
-                        damageable.ChangeDamage(DamageType.Blunt, 2, true, null);
-                    }
-                }
             }
         }
 
-
         public void ResetThirst()
         {
             _currentThirstThreshold = ThirstThreshold.Okay;
@@ -208,5 +211,4 @@ namespace Content.Server.GameObjects.Components.Nutrition
             return new ThirstComponentState(_currentThirstThreshold);
         }
     }
-
 }

Content.Server/GameObjects/Components/Suspicion/SuspicionRoleComponent.cs

@@ -7,6 +7,7 @@ using Content.Server.Mobs;
 using Content.Server.Mobs.Roles;
 using Content.Server.Mobs.Roles.Suspicion;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.Components.Suspicion;
 using Content.Shared.GameObjects.EntitySystems;
 using Robust.Server.GameObjects;
@@ -60,8 +61,8 @@ namespace Content.Server.GameObjects.Components.Suspicion
 
         public bool IsDead()
         {
-            return Owner.TryGetComponent(out IDamageableComponent? damageable) &&
+            return Owner.TryGetComponent(out IMobStateComponent? state) &&
-                   damageable.CurrentState == DamageState.Dead;
+                   state.IsDead();
         }
 
         public bool IsInnocent()

Content.Server/GameObjects/Components/WindowComponent.cs

@@ -1,4 +1,5 @@
-using System;
+#nullable enable
+using System;
 using Content.Server.Utility;
 using Content.Shared.Audio;
 using Content.Shared.GameObjects.Components;
@@ -10,7 +11,9 @@ using Robust.Server.GameObjects;
 using Robust.Server.GameObjects.EntitySystems;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Localization;
+using Robust.Shared.Serialization;
 using Robust.Shared.Utility;
 
 namespace Content.Server.GameObjects.Components
@@ -19,57 +22,46 @@ namespace Content.Server.GameObjects.Components
     [ComponentReference(typeof(SharedWindowComponent))]
     public class WindowComponent : SharedWindowComponent, IExamine, IInteractHand
     {
-        private int? Damage
+        private int _maxDamage;
+
+        public override void ExposeData(ObjectSerializer serializer)
         {
-            get
+            base.ExposeData(serializer);
+
+            serializer.DataField(ref _maxDamage, "maxDamage", 100);
+        }
+
+        public override void HandleMessage(ComponentMessage message, IComponent? component)
+        {
+            base.HandleMessage(message, component);
+
+            switch (message)
             {
-                if (!Owner.TryGetComponent(out IDamageableComponent damageableComponent)) return null;
+                case DamageChangedMessage msg:
-                return damageableComponent.TotalDamage;
+                {
+                    var current = msg.Damageable.TotalDamage;
+                    UpdateVisuals(current);
+                    break;
+                }
             }
         }
 
-        private int? MaxDamage
+        private void UpdateVisuals(int currentDamage)
         {
-            get
+            if (Owner.TryGetComponent(out AppearanceComponent? appearance))
             {
-                if (!Owner.TryGetComponent(out IDamageableComponent damageableComponent)) return null;
+                appearance.SetData(WindowVisuals.Damage, (float) currentDamage / _maxDamage);
-                return damageableComponent.Thresholds[DamageState.Dead];
             }
         }
 
-        public override void Initialize()
-        {
-            base.Initialize();
-            if (Owner.TryGetComponent(out IDamageableComponent damageableComponent))
-            {
-                damageableComponent.HealthChangedEvent += OnDamage;
-            }
-        }
-
-        private void OnDamage(HealthChangedEventArgs eventArgs)
-        {
-            int current = eventArgs.Damageable.TotalDamage;
-            int max = eventArgs.Damageable.Thresholds[DamageState.Dead];
-            if (eventArgs.Damageable.CurrentState == DamageState.Dead) return;
-            UpdateVisuals(current, max);
-        }
-
-        private void UpdateVisuals(int currentDamage, int maxDamage)
-        {
-            if (Owner.TryGetComponent(out AppearanceComponent appearance))
-            {
-                appearance.SetData(WindowVisuals.Damage, (float) currentDamage / maxDamage);
-            }
-        }
-
-
         void IExamine.Examine(FormattedMessage message, bool inDetailsRange)
         {
-            int? damage = Damage;
+            var damage = Owner.GetComponentOrNull<IDamageableComponent>()?.TotalDamage;
-            int? maxDamage = MaxDamage;
+            if (damage == null) return;
-            if (damage == null || maxDamage == null) return;
+            var fraction = ((damage == 0 || _maxDamage == 0)
-            float fraction = ((damage == 0 || maxDamage == 0) ? 0f : (float) damage / maxDamage) ?? 0f;
+                ? 0f
-            int level = Math.Min(ContentHelpers.RoundToLevels(fraction, 1, 7), 5);
+                : (float) damage / _maxDamage);
+            var level = Math.Min(ContentHelpers.RoundToLevels(fraction, 1, 7), 5);
             switch (level)
             {
                 case 0:

Content.Server/GameObjects/EntitySystems/AI/AiSystem.cs

@@ -1,8 +1,10 @@
 #nullable enable
 using System;
 using System.Collections.Generic;
+using Content.Server.AI.Utility.AiLogic;
 using Content.Server.Administration;
 using Content.Server.GameObjects.Components.Movement;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared;
 using Content.Shared.Administration;
 using Content.Shared.GameObjects.Components.Movement;
@@ -38,6 +40,8 @@ namespace Content.Server.GameObjects.EntitySystems.AI
         // To avoid modifying awakeAi while iterating over it.
         private readonly List<SleepAiMessage> _queuedSleepMessages = new();
 
+        private readonly List<MobStateChangedMessage> _queuedMobStateMessages = new();
+
         public bool IsAwake(AiLogicProcessor processor) => _awakeAi.Contains(processor);
 
         /// <inheritdoc />
@@ -45,8 +49,9 @@ namespace Content.Server.GameObjects.EntitySystems.AI
         {
             base.Initialize();
             SubscribeLocalEvent<SleepAiMessage>(HandleAiSleep);
+            SubscribeLocalEvent<MobStateChangedMessage>(MobStateChanged);
 
-            var processors = _reflectionManager.GetAllChildren<AiLogicProcessor>();
+            var processors = _reflectionManager.GetAllChildren<UtilityAi>();
             foreach (var processor in processors)
             {
                 var att = (AiLogicProcessorAttribute) Attribute.GetCustomAttribute(processor, typeof(AiLogicProcessorAttribute))!;
@@ -63,6 +68,18 @@ namespace Content.Server.GameObjects.EntitySystems.AI
             if (cvarMaxUpdates <= 0)
                 return;
 
+            foreach (var message in _queuedMobStateMessages)
+            {
+                if (!message.Entity.TryGetComponent(out AiControllerComponent? controller))
+                {
+                    continue;
+                }
+
+                controller.Processor?.MobStateChanged(message);
+            }
+
+            _queuedMobStateMessages.Clear();
+
             foreach (var message in _queuedSleepMessages)
             {
                 switch (message.Sleep)
@@ -118,6 +135,16 @@ namespace Content.Server.GameObjects.EntitySystems.AI
             _queuedSleepMessages.Add(message);
         }
 
+        private void MobStateChanged(MobStateChangedMessage message)
+        {
+            if (!message.Entity.HasComponent<AiControllerComponent>())
+            {
+                return;
+            }
+
+            _queuedMobStateMessages.Add(message);
+        }
+
         /// <summary>
         ///     Will start up the controller's processor if not already done so.
         ///     Also add them to the awakeAi for updates.
@@ -132,11 +159,11 @@ namespace Content.Server.GameObjects.EntitySystems.AI
             _awakeAi.Add(controller.Processor);
         }
 
-        private AiLogicProcessor CreateProcessor(string name)
+        private UtilityAi CreateProcessor(string name)
         {
             if (_processorTypes.TryGetValue(name, out var type))
             {
-                return (AiLogicProcessor)_typeFactory.CreateInstance(type);
+                return (UtilityAi)_typeFactory.CreateInstance(type);
             }
 
             // processor needs to inherit AiLogicProcessor, and needs an AiLogicProcessorAttribute to define the YAML name

Content.Server/GameObjects/EntitySystems/DoAfter/DoAfter.cs

@@ -63,7 +63,7 @@ namespace Content.Server.GameObjects.EntitySystems.DoAfter
             AsTask = Tcs.Task;
         }
 
-        public void HandleDamage(HealthChangedEventArgs args)
+        public void HandleDamage(DamageChangedEventArgs args)
         {
             _tookDamage = true;
         }

Content.Server/GameTicking/GameRules/RuleDeathMatch.cs

@@ -4,6 +4,7 @@ using Content.Server.Interfaces.Chat;
 using Content.Server.Interfaces.GameTicking;
 using Content.Shared;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Server.Interfaces.Player;
 using Robust.Server.Player;
 using Robust.Shared.Enums;
@@ -36,7 +37,7 @@ namespace Content.Server.GameTicking.GameRules
         {
             _chatManager.DispatchServerAnnouncement(Loc.GetString("The game is now a death match. Kill everybody else to win!"));
 
-            _entityManager.EventBus.SubscribeEvent<HealthChangedEventArgs>(EventSource.Local, this, OnHealthChanged);
+            _entityManager.EventBus.SubscribeEvent<DamageChangedEventArgs>(EventSource.Local, this, OnHealthChanged);
             _playerManager.PlayerStatusChanged += PlayerManagerOnPlayerStatusChanged;
         }
 
@@ -44,11 +45,11 @@ namespace Content.Server.GameTicking.GameRules
         {
             base.Removed();
 
-            _entityManager.EventBus.UnsubscribeEvent<HealthChangedEventArgs>(EventSource.Local, this);
+            _entityManager.EventBus.UnsubscribeEvent<DamageChangedEventArgs>(EventSource.Local, this);
             _playerManager.PlayerStatusChanged -= PlayerManagerOnPlayerStatusChanged;
         }
 
-        private void OnHealthChanged(HealthChangedEventArgs message)
+        private void OnHealthChanged(DamageChangedEventArgs message)
         {
             _runDelayedCheck();
         }
@@ -63,13 +64,14 @@ namespace Content.Server.GameTicking.GameRules
             IPlayerSession winner = null;
             foreach (var playerSession in _playerManager.GetAllPlayers())
             {
-                if (playerSession.AttachedEntity == null
+                var playerEntity = playerSession.AttachedEntity;
-                    || !playerSession.AttachedEntity.TryGetComponent(out IDamageableComponent damageable))
+                if (playerEntity == null
+                    || !playerEntity.TryGetComponent(out IMobStateComponent state))
                 {
                     continue;
                 }
 
-                if (damageable.CurrentState != DamageState.Alive)
+                if (!state.IsAlive())
                 {
                     continue;
                 }

Content.Server/GameTicking/GameRules/RuleSuspicion.cs

@@ -8,6 +8,7 @@ using Content.Server.Mobs.Roles.Suspicion;
 using Content.Server.Players;
 using Content.Shared;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Server.GameObjects.EntitySystems;
 using Robust.Server.Interfaces.Player;
 using Robust.Shared.Audio;
@@ -111,13 +112,13 @@ namespace Content.Server.GameTicking.GameRules
             foreach (var playerSession in _playerManager.GetAllPlayers())
             {
                 if (playerSession.AttachedEntity == null
-                    || !playerSession.AttachedEntity.TryGetComponent(out IDamageableComponent damageable)
+                    || !playerSession.AttachedEntity.TryGetComponent(out IMobStateComponent mobState)
                     || !playerSession.AttachedEntity.HasComponent<SuspicionRoleComponent>())
                 {
                     continue;
                 }
 
-                if (damageable.CurrentState != DamageState.Alive)
+                if (!mobState.IsAlive())
                 {
                     continue;
                 }

Content.Server/GlobalVerbs/RejuvenateVerb.cs

@@ -2,6 +2,7 @@
 using Content.Server.GameObjects.Components.Mobs;
 using Content.Server.GameObjects.Components.Nutrition;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Content.Shared.GameObjects.Verbs;
 using Robust.Server.Console;
 using Robust.Server.Interfaces.GameObjects;
@@ -58,7 +59,11 @@ namespace Content.Server.GlobalVerbs
             if (target.TryGetComponent(out IDamageableComponent damage))
             {
                 damage.Heal();
-                damage.CurrentState = DamageState.Alive;
+            }
+
+            if (target.TryGetComponent(out IMobStateComponent mobState))
+            {
+                mobState.UpdateState(0);
             }
 
             if (target.TryGetComponent(out HungerComponent hunger))

Content.Server/Objectives/Conditions/DieCondition.cs

@@ -1,7 +1,7 @@
 #nullable enable
 using Content.Server.Mobs;
 using Content.Server.Objectives.Interfaces;
-using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using JetBrains.Annotations;
 using Robust.Shared.Localization;
 using Robust.Shared.Utility;
@@ -24,11 +24,12 @@ namespace Content.Server.Objectives.Conditions
 
         public SpriteSpecifier Icon => new SpriteSpecifier.Rsi(new ResourcePath("Mobs/Ghosts/ghost_human.rsi"), "icon");
 
-        public float Progress => _mind?.OwnedEntity != null &&
+        public float Progress => _mind?
-                                 _mind.OwnedEntity.TryGetComponent<IDamageableComponent>(out var damageableComponent) &&
+            .OwnedEntity?
-                                    damageableComponent.CurrentState != DamageState.Dead
+            .GetComponentOrNull<IMobStateComponent>()?
-                                    ? 0f
+            .IsDead() ?? false
-                                    : 1f;
+            ? 0f
+            : 1f;
 
         public float Difficulty => 1f;
 

Content.Server/Objectives/Conditions/KillPersonCondition.cs

@@ -1,7 +1,7 @@
 #nullable enable
 using Content.Server.Mobs;
 using Content.Server.Objectives.Interfaces;
-using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Shared.Localization;
 using Robust.Shared.Utility;
 
@@ -18,12 +18,12 @@ namespace Content.Server.Objectives.Conditions
 
         public SpriteSpecifier Icon => new SpriteSpecifier.Rsi(new ResourcePath("Objects/Weapons/Guns/Pistols/mk58_wood.rsi"), "icon");
 
-        public float Progress => Target?.OwnedEntity != null &&
+        public float Progress => Target?
-                                 Target.OwnedEntity
+            .OwnedEntity?
-                                     .TryGetComponent<IDamageableComponent>(out var damageableComponent) &&
+            .GetComponentOrNull<IMobStateComponent>()?
-                                 damageableComponent.CurrentState == DamageState.Dead
+            .IsDead() ?? false
-                                    ? 1f
+            ? 1f
-                                    : 0f;
+            : 0f;
 
         public float Difficulty => 2f;
 

Content.Server/Objectives/Conditions/KillRandomPersonCondition.cs

@@ -2,7 +2,7 @@
 using Content.Server.GameObjects.Components.Mobs;
 using Content.Server.Mobs;
 using Content.Server.Objectives.Interfaces;
-using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using JetBrains.Annotations;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Interfaces.Random;
@@ -20,10 +20,7 @@ namespace Content.Server.Objectives.Conditions
             var allHumans = entityMgr.ComponentManager.EntityQuery<MindComponent>().Where(mc =>
             {
                 var entity = mc.Mind?.OwnedEntity;
-                return entity != null &&
+                return (entity?.GetComponentOrNull<IMobStateComponent>()?.IsAlive() ?? false) && mc.Mind != mind;
-                       entity.TryGetComponent<IDamageableComponent>(out var damageableComponent) &&
-                       damageableComponent.CurrentState == DamageState.Alive
-                       && mc.Mind != mind;
             }).Select(mc => mc.Mind).ToList();
             return new KillRandomPersonCondition {Target = IoCManager.Resolve<IRobustRandom>().Pick(allHumans)};
         }

Content.Server/Objectives/Conditions/StayAliveCondition.cs

@@ -1,7 +1,7 @@
 #nullable enable
 using Content.Server.Mobs;
 using Content.Server.Objectives.Interfaces;
-using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using JetBrains.Annotations;
 using Robust.Shared.Localization;
 using Robust.Shared.Utility;
@@ -24,11 +24,12 @@ namespace Content.Server.Objectives.Conditions
 
         public SpriteSpecifier Icon => new SpriteSpecifier.Rsi(new ResourcePath("Objects/Misc/skub.rsi"), "icon"); //didn't know what else would have been a good icon for staying alive
 
-        public float Progress => _mind?.OwnedEntity != null &&
+        public float Progress => _mind?
-                                 _mind.OwnedEntity.TryGetComponent<IDamageableComponent>(out var damageableComponent) &&
+            .OwnedEntity?
-                                 damageableComponent.CurrentState == DamageState.Dead
+            .GetComponentOrNull<IMobStateComponent>()?
-                                    ? 0f
+            .IsDead() ?? false
-                                    : 1f;
+            ? 0f
+            : 1f;
 
         public float Difficulty => 1f;
 

Content.Server/StationEvents/BoltsDown.cs

@@ -5,6 +5,7 @@ using Content.Server.GameObjects.Components.GUI;
 using Content.Server.GameObjects.Components.Items.Storage;
 using Content.Shared.GameObjects.Components.Inventory;
 using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.Components.Mobs.State;
 using Robust.Server.GameObjects.EntitySystems;
 using Robust.Server.Interfaces.Player;
 using Robust.Shared.Audio;
@@ -40,17 +41,23 @@ namespace Content.Server.StationEvents
             var playerManager = IoCManager.Resolve<IPlayerManager>();
             foreach (var player in playerManager.GetAllPlayers())
             {
-                if (player.AttachedEntity == null || !player.AttachedEntity.TryGetComponent(out InventoryComponent? inventory)) return;
+                var playerEntity = player.AttachedEntity;
+                if (playerEntity == null || !playerEntity.TryGetComponent(out InventoryComponent? inventory)) return;
                 if (inventory.TryGetSlotItem(EquipmentSlotDefines.Slots.BELT, out ItemComponent? item)
                     && item?.Owner.Prototype?.ID == "UtilityBeltClothingFilledEvent") return;
-                if (player.AttachedEntity.TryGetComponent<IDamageableComponent>(out var damageable)
+                if (playerEntity.TryGetComponent(out IDamageableComponent? damageable) &&
-                && damageable.CurrentState == DamageState.Dead) return;
+                    playerEntity.TryGetComponent(out IMobStateComponent? mobState) &&
+                    mobState.IsDead())
+                {
+                    return;
+                }
 
                 var entityManager = IoCManager.Resolve<IEntityManager>();
-                var playerPos = player.AttachedEntity.Transform.Coordinates;
+                var playerPos = playerEntity.Transform.Coordinates;
                 entityManager.SpawnEntity("UtilityBeltClothingFilledEvent", playerPos);
             }
         }
+
         public override void Shutdown()
         {
             base.Shutdown();
@@ -59,6 +66,7 @@ namespace Content.Server.StationEvents
             var componentManager = IoCManager.Resolve<IComponentManager>();
             foreach (var component in componentManager.EntityQuery<AirlockComponent>()) component.BoltsDown = false;
         }
+
         public override void Update(float frameTime)
         {
             if (!Running)

Content.Shared/Damage/DamageClass.cs

@@ -18,6 +18,7 @@ namespace Content.Shared.Damage
 
     public static class DamageClassExtensions
     {
+        // TODO DAMAGE This but not hardcoded
         private static readonly ImmutableDictionary<DamageClass, List<DamageType>> ClassToType =
             new Dictionary<DamageClass, List<DamageType>>
             {

Content.Shared/Damage/DamageContainer/DamageContainer.cs

@@ -1,285 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
-using System.Linq;
-using Content.Shared.GameObjects.Components.Damage;
-using Robust.Shared.Serialization;
-using Robust.Shared.ViewVariables;
-
-namespace Content.Shared.Damage.DamageContainer
-{
-    /// <summary>
-    ///     Holds the information regarding the various forms of damage an object has
-    ///     taken (i.e. brute, burn, or toxic damage).
-    /// </summary>
-    [Serializable, NetSerializable]
-    public class DamageContainer
-    {
-        private Dictionary<DamageType, int> _damageList = DamageTypeExtensions.ToDictionary();
-
-        public delegate void HealthChangedDelegate(List<HealthChangeData> changes);
-
-        [NonSerialized] public readonly HealthChangedDelegate OnHealthChanged;
-
-        public DamageContainer(HealthChangedDelegate onHealthChanged, DamageContainerPrototype data)
-        {
-            ID = data.ID;
-            OnHealthChanged = onHealthChanged;
-            SupportedClasses = data.ActiveDamageClasses;
-        }
-
-        public string ID { get; }
-
-        [ViewVariables] public virtual List<DamageClass> SupportedClasses { get; }
-
-        [ViewVariables]
-        public virtual List<DamageType> SupportedTypes
-        {
-            get
-            {
-                var toReturn = new List<DamageType>();
-                foreach (var @class in SupportedClasses)
-                {
-                    toReturn.AddRange(@class.ToTypes());
-                }
-
-                return toReturn;
-            }
-        }
-
-        /// <summary>
-        ///     Sum of all damages kept on record.
-        /// </summary>
-        [ViewVariables]
-        public int TotalDamage => _damageList.Values.Sum();
-
-        public IReadOnlyDictionary<DamageClass, int> DamageClasses =>
-            DamageTypeExtensions.ToClassDictionary(DamageTypes);
-
-        public IReadOnlyDictionary<DamageType, int> DamageTypes => _damageList;
-
-        public bool SupportsDamageClass(DamageClass @class)
-        {
-            return SupportedClasses.Contains(@class);
-        }
-
-        public bool SupportsDamageType(DamageType type)
-        {
-            return SupportedClasses.Contains(type.ToClass());
-        }
-
-        /// <summary>
-        ///     Attempts to grab the damage value for the given <see cref="DamageType"/>.
-        /// </summary>
-        /// <returns>
-        ///     False if the container does not support that type, true otherwise.
-        /// </returns>
-        public bool TryGetDamageValue(DamageType type, [NotNullWhen(true)] out int damage)
-        {
-            return _damageList.TryGetValue(type, out damage);
-        }
-
-        /// <summary>
-        ///     Grabs the damage value for the given <see cref="DamageType"/>.
-        /// </summary>
-        public int GetDamageValue(DamageType type)
-        {
-            return TryGetDamageValue(type, out var damage) ? damage : 0;
-        }
-
-        /// <summary>
-        ///     Attempts to grab the sum of damage values for the given
-        ///     <see cref="DamageClasses"/>.
-        /// </summary>
-        /// <param name="class">The class to get the sum for.</param>
-        /// <param name="damage">The resulting amount of damage, if any.</param>
-        /// <returns>
-        ///     True if the class is supported in this container, false otherwise.
-        /// </returns>
-        public bool TryGetDamageClassSum(DamageClass @class, [NotNullWhen(true)] out int damage)
-        {
-            damage = 0;
-
-            if (SupportsDamageClass(@class))
-            {
-                foreach (var type in @class.ToTypes())
-                {
-                    damage += GetDamageValue(type);
-                }
-
-                return true;
-            }
-
-            return false;
-        }
-
-        /// <summary>
-        ///     Grabs the sum of damage values for the given <see cref="DamageClasses"/>.
-        /// </summary>
-        public int GetDamageClassSum(DamageClass damageClass)
-        {
-            var sum = 0;
-
-            foreach (var type in damageClass.ToTypes())
-            {
-                sum += GetDamageValue(type);
-            }
-
-            return sum;
-        }
-
-        /// <summary>
-        ///     Attempts to change the damage value for the given
-        ///     <see cref="DamageType"/>
-        /// </summary>
-        /// <returns>
-        ///     True if successful, false if this container does not support that type.
-        /// </returns>
-        public bool TryChangeDamageValue(DamageType type, int delta)
-        {
-            var damageClass = type.ToClass();
-
-            if (SupportsDamageClass(damageClass))
-            {
-                var current = _damageList[type];
-                current = _damageList[type] = current + delta;
-
-                if (_damageList[type] < 0)
-                {
-                    _damageList[type] = 0;
-                    delta = -current;
-                    current = 0;
-                }
-
-                var datum = new HealthChangeData(type, current, delta);
-                var data = new List<HealthChangeData> {datum};
-
-                OnHealthChanged(data);
-
-                return true;
-            }
-
-            return false;
-        }
-
-        /// <summary>
-        ///     Changes the damage value for the given <see cref="DamageType"/>.
-        /// </summary>
-        /// <param name="type">The type of damage to change.</param>
-        /// <param name="delta">The amount to change it by.</param>
-        /// <param name="quiet">
-        ///     Whether or not to suppress the health change event.
-        /// </param>
-        /// <returns>
-        ///     True if successful, false if this container does not support that type.
-        /// </returns>
-        public bool ChangeDamageValue(DamageType type, int delta, bool quiet = false)
-        {
-            if (!_damageList.TryGetValue(type, out var current))
-            {
-                return false;
-            }
-
-            _damageList[type] = current + delta;
-
-            if (_damageList[type] < 0)
-            {
-                _damageList[type] = 0;
-                delta = -current;
-            }
-
-            current = _damageList[type];
-
-            var datum = new HealthChangeData(type, current, delta);
-            var data = new List<HealthChangeData> {datum};
-
-            OnHealthChanged(data);
-
-            return true;
-        }
-
-        /// <summary>
-        ///     Attempts to set the damage value for the given <see cref="DamageType"/>.
-        /// </summary>
-        /// <returns>
-        ///     True if successful, false if this container does not support that type.
-        /// </returns>
-        public bool TrySetDamageValue(DamageType type, int newValue)
-        {
-            if (newValue < 0)
-            {
-                return false;
-            }
-
-            var damageClass = type.ToClass();
-
-            if (SupportedClasses.Contains(damageClass))
-            {
-                var old = _damageList[type] = newValue;
-                _damageList[type] = newValue;
-
-                var delta = newValue - old;
-                var datum = new HealthChangeData(type, newValue, delta);
-                var data = new List<HealthChangeData> {datum};
-
-                OnHealthChanged(data);
-
-                return true;
-            }
-
-            return false;
-        }
-
-        /// <summary>
-        ///     Tries to set the damage value for the given <see cref="DamageType"/>.
-        /// </summary>
-        /// <param name="type">The type of damage to set.</param>
-        /// <param name="newValue">The value to set it to.</param>
-        /// <param name="quiet">
-        ///     Whether or not to suppress the health changed event.
-        /// </param>
-        /// <returns>True if successful, false otherwise.</returns>
-        public bool SetDamageValue(DamageType type, int newValue, bool quiet = false)
-        {
-            if (newValue < 0)
-            {
-                return false;
-            }
-
-            if (!_damageList.ContainsKey(type))
-            {
-                return false;
-            }
-
-            var old = _damageList[type];
-            _damageList[type] = newValue;
-
-            if (!quiet)
-            {
-                var delta = newValue - old;
-                var datum = new HealthChangeData(type, 0, delta);
-                var data = new List<HealthChangeData> {datum};
-
-                OnHealthChanged(data);
-            }
-
-            return true;
-        }
-
-        public void Heal()
-        {
-            var data = new List<HealthChangeData>();
-
-            foreach (var type in SupportedTypes)
-            {
-                var delta = -GetDamageValue(type);
-                var datum = new HealthChangeData(type, 0, delta);
-
-                data.Add(datum);
-                SetDamageValue(type, 0, true);
-            }
-
-            OnHealthChanged(data);
-        }
-    }
-}

Content.Shared/Damage/DamageContainer/DamageContainerPrototype.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Robust.Shared.Prototypes;
 using Robust.Shared.Serialization;
 using Robust.Shared.ViewVariables;
@@ -14,18 +15,37 @@ namespace Content.Shared.Damage.DamageContainer
     [Serializable, NetSerializable]
     public class DamageContainerPrototype : IPrototype, IIndexedPrototype
     {
-        private List<DamageClass> _activeDamageClasses;
+        private HashSet<DamageClass> _supportedClasses;
+        private HashSet<DamageType> _supportedTypes;
         private string _id;
 
-        [ViewVariables] public List<DamageClass> ActiveDamageClasses => _activeDamageClasses;
+        // TODO NET 5 IReadOnlySet
+        [ViewVariables] public IReadOnlyCollection<DamageClass> SupportedClasses => _supportedClasses;
+
+        [ViewVariables] public IReadOnlyCollection<DamageType> SupportedTypes => _supportedTypes;
 
         [ViewVariables] public string ID => _id;
 
         public virtual void LoadFrom(YamlMappingNode mapping)
         {
             var serializer = YamlObjectSerializer.NewReader(mapping);
+
             serializer.DataField(ref _id, "id", string.Empty);
-            serializer.DataField(ref _activeDamageClasses, "activeDamageClasses", new List<DamageClass>());
+            serializer.DataField(ref _supportedClasses, "supportedClasses", new HashSet<DamageClass>());
+            serializer.DataField(ref _supportedTypes, "supportedTypes", new HashSet<DamageType>());
+
+            var originalTypes = _supportedTypes.ToArray();
+
+            foreach (var supportedClass in _supportedClasses)
+            foreach (var supportedType in supportedClass.ToTypes())
+            {
+                _supportedTypes.Add(supportedType);
+            }
+
+            foreach (var originalType in originalTypes)
+            {
+                _supportedClasses.Add(originalType.ToClass());
+            }
         }
     }
 }

Content.Shared/Damage/DamageType.cs

@@ -38,8 +38,7 @@ namespace Content.Shared.Damage
                 {DamageType.Radiation, DamageClass.Toxin},
                 {DamageType.Asphyxiation, DamageClass.Airloss},
                 {DamageType.Bloodloss, DamageClass.Airloss},
-                {DamageType.Cellular, DamageClass.Genetic }
+                {DamageType.Cellular, DamageClass.Genetic}
-
             }.ToImmutableDictionary();
 
         public static DamageClass ToClass(this DamageType type)

Content.Shared/Damage/ResistanceSet/ResistanceSet.cs

@@ -6,7 +6,9 @@ using Robust.Shared.ViewVariables;
 namespace Content.Shared.Damage.ResistanceSet
 {
     /// <summary>
-    ///     Set of resistances used by damageable objects. Each DamageType has a multiplier and flat damage reduction value.
+    ///     Set of resistances used by damageable objects.
+    ///     Each <see cref="DamageType"/> has a multiplier and flat damage
+    ///     reduction value.
     /// </summary>
     [NetSerializable]
     [Serializable]
@@ -33,14 +35,15 @@ namespace Content.Shared.Damage.ResistanceSet
         public string ID { get; }
 
         /// <summary>
-        ///     Adjusts input damage with the resistance set values. Only applies reduction if the amount is damage (positive), not
+        ///     Adjusts input damage with the resistance set values.
+        ///     Only applies reduction if the amount is damage (positive), not
         ///     healing (negative).
         /// </summary>
         /// <param name="damageType">Type of damage.</param>
         /// <param name="amount">Incoming amount of damage.</param>
         public int CalculateDamage(DamageType damageType, int amount)
         {
-            if (amount > 0) //Only apply reduction if it's healing, not damage.
+            if (amount > 0) // Only apply reduction if it's healing, not damage.
             {
                 amount -= _resistances[damageType].FlatReduction;
 
@@ -59,8 +62,7 @@ namespace Content.Shared.Damage.ResistanceSet
     /// <summary>
     ///     Settings for a specific damage type in a resistance set. Flat reduction is applied before the coefficient.
     /// </summary>
-    [NetSerializable]
+    [Serializable, NetSerializable]
-    [Serializable]
     public struct ResistanceSetSettings
     {
         [ViewVariables] public float Coefficient { get; private set; }

Content.Shared/GameObjects/Components/Body/SharedBodyComponent.cs

@@ -3,6 +3,7 @@ using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
+using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Body.Part;
 using Content.Shared.GameObjects.Components.Body.Part.Property;
 using Content.Shared.GameObjects.Components.Body.Preset;
@@ -103,8 +104,7 @@ namespace Content.Shared.GameObjects.Components.Body
             {
                 if (part.IsVital && Parts.Count(x => x.Value.PartType == part.PartType) == 0)
                 {
-                    damageable.CurrentState = DamageState.Dead;
+                    damageable.ChangeDamage(DamageType.Bloodloss, 300, true); // TODO BODY KILL
-                    damageable.ForceHealthChangedEvent();
                 }
             }
 

Content.Shared/GameObjects/Components/Damage/DamageChangeData.cs

@@ -0,0 +1,33 @@
+using Content.Shared.Damage;
+
+namespace Content.Shared.GameObjects.Components.Damage
+{
+    /// <summary>
+    ///     Data class with information on how the value of a
+    ///     single <see cref="DamageType"/> has changed.
+    /// </summary>
+    public struct DamageChangeData
+    {
+        /// <summary>
+        ///     Type of damage that changed.
+        /// </summary>
+        public DamageType Type;
+
+        /// <summary>
+        ///     The new current value for that damage.
+        /// </summary>
+        public int NewValue;
+
+        /// <summary>
+        ///     How much the health value changed from its last value (negative is heals, positive is damage).
+        /// </summary>
+        public int Delta;
+
+        public DamageChangeData(DamageType type, int newValue, int delta)
+        {
+            Type = type;
+            NewValue = newValue;
+            Delta = delta;
+        }
+    }
+}

Content.Shared/GameObjects/Components/Damage/DamageChangeParams.cs

@@ -0,0 +1,16 @@
+using System;
+using Content.Shared.GameObjects.Components.Body;
+
+namespace Content.Shared.GameObjects.Components.Damage
+{
+    /// <summary>
+    ///     Data class with information on how to damage a
+    ///     <see cref="IDamageableComponent"/>.
+    ///     While not necessary to damage for all instances, classes such as
+    ///     <see cref="SharedBodyComponent"/> may require it for extra data
+    ///     (such as selecting which limb to target).
+    /// </summary>
+    public class DamageChangeParams : EventArgs
+    {
+    }
+}

Content.Shared/GameObjects/Components/Damage/DamageChangedEventArgs.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using Content.Shared.Damage;
+
+namespace Content.Shared.GameObjects.Components.Damage
+{
+    public class DamageChangedEventArgs : EventArgs
+    {
+        public DamageChangedEventArgs(IDamageableComponent damageable, IReadOnlyList<DamageChangeData> data)
+        {
+            Damageable = damageable;
+            Data = data;
+        }
+
+        public DamageChangedEventArgs(IDamageableComponent damageable, DamageType type, int newValue, int delta)
+        {
+            Damageable = damageable;
+
+            var datum = new DamageChangeData(type, newValue, delta);
+            var data = new List<DamageChangeData> {datum};
+
+            Data = data;
+        }
+
+        /// <summary>
+        ///     Reference to the <see cref="IDamageableComponent"/> that invoked the event.
+        /// </summary>
+        public IDamageableComponent Damageable { get; }
+
+        /// <summary>
+        ///     List containing data on each <see cref="DamageType"/> that was changed.
+        /// </summary>
+        public IReadOnlyList<DamageChangeData> Data { get; }
+    }
+}

Content.Shared/GameObjects/Components/Damage/DamageChangedMessage.cs

@@ -0,0 +1,35 @@
+using System.Collections.Generic;
+using Content.Shared.Damage;
+using Robust.Shared.GameObjects;
+
+namespace Content.Shared.GameObjects.Components.Damage
+{
+    public class DamageChangedMessage : ComponentMessage
+    {
+        public DamageChangedMessage(IDamageableComponent damageable, IReadOnlyList<DamageChangeData> data)
+        {
+            Damageable = damageable;
+            Data = data;
+        }
+
+        public DamageChangedMessage(IDamageableComponent damageable, DamageType type, int newValue, int delta)
+        {
+            Damageable = damageable;
+
+            var datum = new DamageChangeData(type, newValue, delta);
+            var data = new List<DamageChangeData> {datum};
+
+            Data = data;
+        }
+
+        /// <summary>
+        ///     Reference to the <see cref="IDamageableComponent"/> that invoked the event.
+        /// </summary>
+        public IDamageableComponent Damageable { get; }
+
+        /// <summary>
+        ///     List containing data on each <see cref="DamageType"/> that was changed.
+        /// </summary>
+        public IReadOnlyList<DamageChangeData> Data { get; }
+    }
+}

Content.Shared/GameObjects/Components/Damage/DamageState.cs

@@ -1,24 +0,0 @@
-using System;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.Serialization;
-
-namespace Content.Shared.GameObjects.Components.Damage
-{
-    // TODO: Fix summary
-    /// <summary>
-    ///     Defines what state an <see cref="IEntity"/> with a
-    ///     <see cref="IDamageableComponent"/> is in.
-    ///     Not all states must be supported - for instance, the
-    ///     <see cref="RuinableComponent"/> only supports
-    ///     <see cref="DamageState.Alive"/> and <see cref="DamageState.Dead"/>,
-    ///     as inanimate objects don't go into crit.
-    /// </summary>
-    [Serializable, NetSerializable]
-    public enum DamageState
-    {
-        Invalid = 0,
-        Alive,
-        Critical,
-        Dead
-    }
-}

Content.Shared/GameObjects/Components/Damage/DamageableComponent.cs

@@ -1,6 +1,7 @@
 #nullable enable
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Content.Shared.Damage;
 using Content.Shared.Damage.DamageContainer;
 using Content.Shared.Damage.ResistanceSet;
@@ -31,51 +32,28 @@ namespace Content.Shared.GameObjects.Components.Damage
 
         public override string Name => "Damageable";
 
-        private DamageState _damageState;
+        public override uint? NetID => ContentNetIDs.DAMAGEABLE;
+
+        private readonly Dictionary<DamageType, int> _damageList = DamageTypeExtensions.ToDictionary();
+        private readonly HashSet<DamageType> _supportedTypes = new();
+        private readonly HashSet<DamageClass> _supportedClasses = new();
         private DamageFlag _flags;
 
-        public event Action<HealthChangedEventArgs>? HealthChangedEvent;
+        public event Action<DamageChangedEventArgs>? HealthChangedEvent;
+
+        // TODO DAMAGE Use as default values, specify overrides in a separate property through yaml for better (de)serialization
+        [ViewVariables] public string DamageContainerId { get; set; } = default!;
 
         [ViewVariables] private ResistanceSet Resistances { get; set; } = default!;
 
-        [ViewVariables] private DamageContainer Damage { get; set; } = default!;
+        // TODO DAMAGE Cache this
+        [ViewVariables] public int TotalDamage => _damageList.Values.Sum();
 
-        public Dictionary<DamageState, int> Thresholds { get; set; } = new();
+        [ViewVariables]
+        public IReadOnlyDictionary<DamageClass, int> DamageClasses =>
+            DamageTypeExtensions.ToClassDictionary(_damageList);
 
-        public virtual List<DamageState> SupportedDamageStates
+        [ViewVariables] public IReadOnlyDictionary<DamageType, int> DamageTypes => _damageList;
-        {
-            get
-            {
-                var states = new List<DamageState> {DamageState.Alive};
-
-                states.AddRange(Thresholds.Keys);
-
-                return states;
-            }
-        }
-
-        public virtual DamageState CurrentState
-        {
-            get => _damageState;
-            set
-            {
-                var old = _damageState;
-                _damageState = value;
-
-                if (old != value)
-                {
-                    EnterState(value);
-                }
-
-                Dirty();
-            }
-        }
-
-        [ViewVariables] public int TotalDamage => Damage.TotalDamage;
-
-        public IReadOnlyDictionary<DamageClass, int> DamageClasses => Damage.DamageClasses;
-
-        public IReadOnlyDictionary<DamageType, int> DamageTypes => Damage.DamageTypes;
 
         public DamageFlag Flags
         {
@@ -107,41 +85,20 @@ namespace Content.Shared.GameObjects.Components.Damage
             Flags &= ~flag;
         }
 
+        public bool SupportsDamageClass(DamageClass @class)
+        {
+            return _supportedClasses.Contains(@class);
+        }
+
+        public bool SupportsDamageType(DamageType type)
+        {
+            return _supportedTypes.Contains(type);
+        }
+
         public override void ExposeData(ObjectSerializer serializer)
         {
             base.ExposeData(serializer);
 
-            // TODO DAMAGE Serialize as a dictionary of damage states to thresholds
-            serializer.DataReadWriteFunction(
-                "criticalThreshold",
-                null,
-                t =>
-                {
-                    if (t == null)
-                    {
-                        return;
-                    }
-
-                    Thresholds[DamageState.Critical] = t.Value;
-                },
-                () => Thresholds.TryGetValue(DamageState.Critical, out var value) ? value : (int?) null);
-
-            serializer.DataReadWriteFunction(
-                "deadThreshold",
-                null,
-                t =>
-                {
-                    if (t == null)
-                    {
-                        return;
-                    }
-
-                    Thresholds[DamageState.Dead] = t.Value;
-                },
-                () => Thresholds.TryGetValue(DamageState.Dead, out var value) ? value : (int?) null);
-
-            serializer.DataField(ref _damageState, "damageState", DamageState.Alive);
-
             serializer.DataReadWriteFunction(
                 "flags",
                 new List<DamageFlag>(),
@@ -161,7 +118,9 @@ namespace Content.Shared.GameObjects.Components.Damage
                     var writeFlags = new List<DamageFlag>();
 
                     if (Flags == DamageFlag.None)
+                    {
                         return writeFlags;
+                    }
 
                     foreach (var flag in (DamageFlag[]) Enum.GetValues(typeof(DamageFlag)))
                     {
@@ -181,9 +140,15 @@ namespace Content.Shared.GameObjects.Components.Damage
                 prototype =>
                 {
                     var damagePrototype = _prototypeManager.Index<DamageContainerPrototype>(prototype);
-                    Damage = new DamageContainer(OnHealthChanged, damagePrototype);
+
+                    _supportedClasses.Clear();
+                    _supportedTypes.Clear();
+
+                    DamageContainerId = damagePrototype.ID;
+                    _supportedClasses.UnionWith(damagePrototype.SupportedClasses);
+                    _supportedTypes.UnionWith(damagePrototype.SupportedTypes);
                 },
-                () => Damage.ID);
+                () => DamageContainerId);
 
             serializer.DataReadWriteFunction(
                 "resistancePrototype",
@@ -196,16 +161,6 @@ namespace Content.Shared.GameObjects.Components.Damage
                 () => Resistances.ID);
         }
 
-        public override void Initialize()
-        {
-            base.Initialize();
-
-            foreach (var behavior in Owner.GetAllComponents<IOnHealthChangedBehavior>())
-            {
-                HealthChangedEvent += behavior.OnHealthChanged;
-            }
-        }
-
         protected override void Startup()
         {
             base.Startup();
@@ -213,215 +168,302 @@ namespace Content.Shared.GameObjects.Components.Damage
             ForceHealthChangedEvent();
         }
 
-        public bool TryGetDamage(DamageType type, out int damage)
+        public override ComponentState GetComponentState()
         {
-            return Damage.TryGetDamageValue(type, out damage);
+            return new DamageableComponentState(_damageList, _flags);
         }
 
-        public bool ChangeDamage(DamageType type, int amount, bool ignoreResistances,
+        public override void HandleComponentState(ComponentState? curState, ComponentState? nextState)
+        {
+            base.HandleComponentState(curState, nextState);
+
+            if (!(curState is DamageableComponentState state))
+            {
+                return;
+            }
+
+            _damageList.Clear();
+
+            foreach (var (type, damage) in state.DamageList)
+            {
+                _damageList[type] = damage;
+            }
+
+            _flags = state.Flags;
+        }
+
+        public int GetDamage(DamageType type)
+        {
+            return _damageList.GetValueOrDefault(type);
+        }
+
+        public bool TryGetDamage(DamageType type, out int damage)
+        {
+            return _damageList.TryGetValue(type, out damage);
+        }
+
+        public int GetDamage(DamageClass @class)
+        {
+            if (!SupportsDamageClass(@class))
+            {
+                return 0;
+            }
+
+            var damage = 0;
+
+            foreach (var type in @class.ToTypes())
+            {
+                damage += GetDamage(type);
+            }
+
+            return damage;
+        }
+
+        public bool TryGetDamage(DamageClass @class, out int damage)
+        {
+            if (!SupportsDamageClass(@class))
+            {
+                damage = 0;
+                return false;
+            }
+
+            damage = GetDamage(@class);
+            return true;
+        }
+
+        /// <summary>
+        ///     Attempts to set the damage value for the given <see cref="DamageType"/>.
+        /// </summary>
+        /// <returns>
+        ///     True if successful, false if this container does not support that type.
+        /// </returns>
+        public bool TrySetDamage(DamageType type, int newValue)
+        {
+            if (newValue < 0)
+            {
+                return false;
+            }
+
+            var damageClass = type.ToClass();
+
+            if (_supportedClasses.Contains(damageClass))
+            {
+                var old = _damageList[type] = newValue;
+                _damageList[type] = newValue;
+
+                var delta = newValue - old;
+                var datum = new DamageChangeData(type, newValue, delta);
+                var data = new List<DamageChangeData> {datum};
+
+                OnHealthChanged(data);
+
+                return true;
+            }
+
+            return false;
+        }
+
+        public void Heal(DamageType type)
+        {
+            SetDamage(type, 0);
+        }
+
+        public void Heal()
+        {
+            foreach (var type in _supportedTypes)
+            {
+                Heal(type);
+            }
+        }
+
+        public bool ChangeDamage(
+            DamageType type,
+            int amount,
+            bool ignoreResistances,
             IEntity? source = null,
-            HealthChangeParams? extraParams = null)
+            DamageChangeParams? extraParams = null)
         {
             if (amount > 0 && HasFlag(DamageFlag.Invulnerable))
             {
                 return false;
             }
 
-            if (Damage.SupportsDamageType(type))
+            if (!SupportsDamageType(type))
             {
-                var finalDamage = amount;
+                return false;
-                if (!ignoreResistances)
-                {
-                    finalDamage = Resistances.CalculateDamage(type, amount);
-                }
-
-                Damage.ChangeDamageValue(type, finalDamage);
-
-                return true;
             }
 
-            return false;
+            var finalDamage = amount;
+
+            if (!ignoreResistances)
+            {
+                finalDamage = Resistances.CalculateDamage(type, amount);
+            }
+
+            if (!_damageList.TryGetValue(type, out var current))
+            {
+                return false;
+            }
+
+            _damageList[type] = current + finalDamage;
+
+            if (_damageList[type] < 0)
+            {
+                _damageList[type] = 0;
+                finalDamage = -current;
+            }
+
+            current = _damageList[type];
+
+            var datum = new DamageChangeData(type, current, finalDamage);
+            var data = new List<DamageChangeData> {datum};
+
+            OnHealthChanged(data);
+
+            return true;
         }
 
         public bool ChangeDamage(DamageClass @class, int amount, bool ignoreResistances,
             IEntity? source = null,
-            HealthChangeParams? extraParams = null)
+            DamageChangeParams? extraParams = null)
         {
             if (amount > 0 && HasFlag(DamageFlag.Invulnerable))
             {
                 return false;
             }
 
-            if (Damage.SupportsDamageClass(@class))
+            if (!SupportsDamageClass(@class))
             {
-                var types = @class.ToTypes();
+                return false;
+            }
 
-                if (amount < 0)
+            var types = @class.ToTypes();
+
+            if (amount < 0)
+            {
+                // Changing multiple types is a bit more complicated. Might be a better way (formula?) to do this,
+                // but essentially just loops between each damage category until all healing is used up.
+                var healingLeft = amount;
+                var healThisCycle = 1;
+
+                // While we have healing left...
+                while (healingLeft > 0 && healThisCycle != 0)
                 {
-                    // Changing multiple types is a bit more complicated. Might be a better way (formula?) to do this,
+                    // Infinite loop fallback, if no healing was done in a cycle
-                    // but essentially just loops between each damage category until all healing is used up.
+                    // then exit
-                    var healingLeft = amount;
+                    healThisCycle = 0;
-                    var healThisCycle = 1;
 
-                    // While we have healing left...
+                    int healPerType;
-                    while (healingLeft > 0 && healThisCycle != 0)
+                    if (healingLeft > -types.Count)
                     {
-                        // Infinite loop fallback, if no healing was done in a cycle
+                        // Say we were to distribute 2 healing between 3
-                        // then exit
+                        // this will distribute 1 to each (and stop after 2 are given)
-                        healThisCycle = 0;
+                        healPerType = -1;
-
-                        int healPerType;
-                        if (healingLeft > -types.Count && healingLeft < 0)
-                        {
-                            // Say we were to distribute 2 healing between 3
-                            // this will distribute 1 to each (and stop after 2 are given)
-                            healPerType = -1;
-                        }
-                        else
-                        {
-                            // Say we were to distribute 62 healing between 3
-                            // this will distribute 20 to each, leaving 2 for next loop
-                            healPerType = healingLeft / types.Count;
-                        }
-
-                        foreach (var type in types)
-                        {
-                            var healAmount =
-                                Math.Max(Math.Max(healPerType, -Damage.GetDamageValue(type)),
-                                    healingLeft);
-
-                            Damage.ChangeDamageValue(type, healAmount);
-                            healThisCycle += healAmount;
-                            healingLeft -= healAmount;
-                        }
-                    }
-
-                    return true;
-                }
-
-                var damageLeft = amount;
-
-                while (damageLeft > 0)
-                {
-                    int damagePerType;
-
-                    if (damageLeft < types.Count && damageLeft > 0)
-                    {
-                        damagePerType = 1;
                     }
                     else
                     {
-                        damagePerType = damageLeft / types.Count;
+                        // Say we were to distribute 62 healing between 3
+                        // this will distribute 20 to each, leaving 2 for next loop
+                        healPerType = healingLeft / types.Count;
                     }
 
                     foreach (var type in types)
                     {
-                        var damageAmount = Math.Min(damagePerType, damageLeft);
+                        var healAmount =
-                        Damage.ChangeDamageValue(type, damageAmount);
+                            Math.Max(Math.Max(healPerType, -GetDamage(type)), healingLeft);
-                        damageLeft -= damageAmount;
+
+                        ChangeDamage(type, healAmount, true);
+                        healThisCycle += healAmount;
+                        healingLeft -= healAmount;
                     }
                 }
 
                 return true;
             }
 
-            return false;
+            var damageLeft = amount;
+
+            while (damageLeft > 0)
+            {
+                int damagePerType;
+
+                if (damageLeft < types.Count)
+                {
+                    damagePerType = 1;
+                }
+                else
+                {
+                    damagePerType = damageLeft / types.Count;
+                }
+
+                foreach (var type in types)
+                {
+                    var damageAmount = Math.Min(damagePerType, damageLeft);
+                    ChangeDamage(type, damageAmount, true);
+                    damageLeft -= damageAmount;
+                }
+            }
+
+            return true;
         }
 
-        public bool SetDamage(DamageType type, int newValue, IEntity? source = null,
+        public bool SetDamage(DamageType type, int newValue, IEntity? source = null,  DamageChangeParams? extraParams = null)
-            HealthChangeParams? extraParams = null)
         {
             if (newValue >= TotalDamage && HasFlag(DamageFlag.Invulnerable))
             {
                 return false;
             }
 
-            if (Damage.SupportsDamageType(type))
+            if (newValue < 0)
             {
-                Damage.SetDamageValue(type, newValue);
+                return false;
-
-                return true;
             }
 
-            return false;
+            if (!_damageList.ContainsKey(type))
-        }
+            {
+                return false;
+            }
 
-        public void Heal()
+            var old = _damageList[type];
-        {
+            _damageList[type] = newValue;
-            Damage.Heal();
+
+            var delta = newValue - old;
+            var datum = new DamageChangeData(type, 0, delta);
+            var data = new List<DamageChangeData> {datum};
+
+            OnHealthChanged(data);
+
+            return true;
         }
 
         public void ForceHealthChangedEvent()
         {
-            var data = new List<HealthChangeData>();
+            var data = new List<DamageChangeData>();
 
-            foreach (var type in Damage.SupportedTypes)
+            foreach (var type in _supportedTypes)
             {
-                var damage = Damage.GetDamageValue(type);
+                var damage = GetDamage(type);
-                var datum = new HealthChangeData(type, damage, 0);
+                var datum = new DamageChangeData(type, damage, 0);
                 data.Add(datum);
             }
 
             OnHealthChanged(data);
         }
 
-        public (int current, int max)? Health(DamageState threshold)
+        private void OnHealthChanged(List<DamageChangeData> changes)
         {
-            if (!SupportedDamageStates.Contains(threshold) ||
+            var args = new DamageChangedEventArgs(this, changes);
-                !Thresholds.TryGetValue(threshold, out var thresholdValue))
-            {
-                return null;
-            }
-
-            var current = thresholdValue - TotalDamage;
-            return (current, thresholdValue);
-        }
-
-        public bool TryHealth(DamageState threshold, out (int current, int max) health)
-        {
-            var temp = Health(threshold);
-
-            if (temp == null)
-            {
-                health = (default, default);
-                return false;
-            }
-
-            health = temp.Value;
-            return true;
-        }
-
-        private void OnHealthChanged(List<HealthChangeData> changes)
-        {
-            var args = new HealthChangedEventArgs(this, changes);
             OnHealthChanged(args);
         }
 
-        protected virtual void EnterState(DamageState state) { }
+        protected virtual void OnHealthChanged(DamageChangedEventArgs e)
-
-        protected virtual void OnHealthChanged(HealthChangedEventArgs e)
         {
-            if (CurrentState != DamageState.Dead)
-            {
-                if (Thresholds.TryGetValue(DamageState.Dead, out var deadThreshold) &&
-                    TotalDamage > deadThreshold)
-                {
-                    CurrentState = DamageState.Dead;
-                }
-                else if (Thresholds.TryGetValue(DamageState.Critical, out var critThreshold) &&
-                         TotalDamage > critThreshold)
-                {
-                    CurrentState = DamageState.Critical;
-                }
-                else
-                {
-                    CurrentState = DamageState.Alive;
-                }
-            }
-
             Owner.EntityManager.EventBus.RaiseEvent(EventSource.Local, e);
             HealthChangedEvent?.Invoke(e);
 
+            var message = new DamageChangedMessage(this, e.Data);
+            SendMessage(message);
+
             Dirty();
         }
 
@@ -446,4 +488,17 @@ namespace Content.Shared.GameObjects.Components.Damage
             ChangeDamage(DamageType.Heat, damage, false);
         }
     }
+
+    [Serializable, NetSerializable]
+    public class DamageableComponentState : ComponentState
+    {
+        public readonly Dictionary<DamageType, int> DamageList;
+        public readonly DamageFlag Flags;
+
+        public DamageableComponentState(Dictionary<DamageType, int> damageList, DamageFlag flags) : base(ContentNetIDs.DAMAGEABLE)
+        {
+            DamageList = damageList;
+            Flags = flags;
+        }
+    }
 }

Content.Shared/GameObjects/Components/Damage/IDamageableComponent.cs

@@ -1,9 +1,7 @@
 #nullable enable
 using System;
 using System.Collections.Generic;
-using System.Diagnostics.CodeAnalysis;
 using Content.Shared.Damage;
-using Content.Shared.GameObjects.Components.Body;
 using Content.Shared.GameObjects.EntitySystems;
 using Robust.Shared.Interfaces.GameObjects;
 
@@ -17,20 +15,7 @@ namespace Content.Shared.GameObjects.Components.Damage
         ///     (including both damage negated by resistance or simply inputting 0 as
         ///     the amount of damage to deal).
         /// </summary>
-        event Action<HealthChangedEventArgs> HealthChangedEvent;
+        event Action<DamageChangedEventArgs> HealthChangedEvent;
-
-        Dictionary<DamageState, int> Thresholds { get; }
-
-        /// <summary>
-        ///     List of all <see cref="Damage.DamageState">DamageStates</see> that
-        ///     <see cref="CurrentState"/> can be.
-        /// </summary>
-        List<DamageState> SupportedDamageStates { get; }
-
-        /// <summary>
-        ///     The <see cref="Damage.DamageState"/> currently representing this component.
-        /// </summary>
-        DamageState CurrentState { get; set; }
 
         /// <summary>
         ///     Sum of all damages taken.
@@ -71,6 +56,10 @@ namespace Content.Shared.GameObjects.Components.Damage
         /// <param name="flag">The flag to remove.</param>
         void RemoveFlag(DamageFlag flag);
 
+        bool SupportsDamageClass(DamageClass @class);
+
+        bool SupportsDamageType(DamageType type);
+
         /// <summary>
         ///     Gets the amount of damage of a type.
         /// </summary>
@@ -79,7 +68,7 @@ namespace Content.Shared.GameObjects.Components.Damage
         /// <returns>
         ///     True if the given <see cref="type"/> is supported, false otherwise.
         /// </returns>
-        bool TryGetDamage(DamageType type, [NotNullWhen(true)] out int damage);
+        bool TryGetDamage(DamageType type, out int damage);
 
         /// <summary>
         ///     Changes the specified <see cref="DamageType"/>, applying
@@ -101,10 +90,14 @@ namespace Content.Shared.GameObjects.Components.Damage
         /// </param>
         /// <returns>
         ///     False if the given type is not supported or improper
-        ///     <see cref="HealthChangeParams"/> were provided; true otherwise.
+        ///     <see cref="DamageChangeParams"/> were provided; true otherwise.
         /// </returns>
-        bool ChangeDamage(DamageType type, int amount, bool ignoreResistances, IEntity? source = null,
+        bool ChangeDamage(
-            HealthChangeParams? extraParams = null);
+            DamageType type,
+            int amount,
+            bool ignoreResistances,
+            IEntity? source = null,
+            DamageChangeParams? extraParams = null);
 
         /// <summary>
         ///     Changes the specified <see cref="DamageClass"/>, applying
@@ -127,10 +120,14 @@ namespace Content.Shared.GameObjects.Components.Damage
         /// </param>
         /// <returns>
         ///     Returns false if the given class is not supported or improper
-        ///     <see cref="HealthChangeParams"/> were provided; true otherwise.
+        ///     <see cref="DamageChangeParams"/> were provided; true otherwise.
         /// </returns>
-        bool ChangeDamage(DamageClass @class, int amount, bool ignoreResistances, IEntity? source = null,
+        bool ChangeDamage(
-            HealthChangeParams? extraParams = null);
+            DamageClass @class,
+            int amount,
+            bool ignoreResistances,
+            IEntity? source = null,
+            DamageChangeParams? extraParams = null);
 
         /// <summary>
         ///     Forcefully sets the specified <see cref="DamageType"/> to the given
@@ -145,9 +142,13 @@ namespace Content.Shared.GameObjects.Components.Damage
         /// </param>
         /// <returns>
         ///     Returns false if the given type is not supported or improper
-        ///     <see cref="HealthChangeParams"/> were provided; true otherwise.
+        ///     <see cref="DamageChangeParams"/> were provided; true otherwise.
         /// </returns>
-        bool SetDamage(DamageType type, int newValue, IEntity? source = null, HealthChangeParams? extraParams = null);
+        bool SetDamage(
+            DamageType type,
+            int newValue,
+            IEntity? source = null,
+            DamageChangeParams? extraParams = null);
 
         /// <summary>
         ///     Sets all damage values to zero.
@@ -158,103 +159,5 @@ namespace Content.Shared.GameObjects.Components.Damage
         ///     Invokes the HealthChangedEvent with the current values of health.
         /// </summary>
         void ForceHealthChangedEvent();
-
-        /// <summary>
-        ///     Calculates the health of an entity until it enters
-        ///     <see cref="threshold"/>.
-        /// </summary>
-        /// <param name="threshold">The state to use as a threshold.</param>
-        /// <returns>
-        ///     The current and maximum health on this entity based on
-        ///     <see cref="threshold"/>, or null if the state is not supported.
-        /// </returns>
-        (int current, int max)? Health(DamageState threshold);
-
-        /// <summary>
-        ///     Calculates the health of an entity until it enters
-        ///     <see cref="threshold"/>.
-        /// </summary>
-        /// <param name="threshold">The state to use as a threshold.</param>
-        /// <param name="health">
-        ///     The current and maximum health on this entity based on
-        ///     <see cref="threshold"/>, or null if the state is not supported.
-        /// </param>
-        /// <returns>
-        ///     True if <see cref="threshold"/> is supported, false otherwise.
-        /// </returns>
-        bool TryHealth(DamageState threshold, [NotNullWhen(true)] out (int current, int max) health);
-    }
-
-    /// <summary>
-    ///     Data class with information on how to damage a
-    ///     <see cref="IDamageableComponent"/>.
-    ///     While not necessary to damage for all instances, classes such as
-    ///     <see cref="SharedBodyComponent"/> may require it for extra data
-    ///     (such as selecting which limb to target).
-    /// </summary>
-    public class HealthChangeParams : EventArgs
-    {
-    }
-
-    /// <summary>
-    ///     Data class with information on how the <see cref="DamageType"/>
-    ///     values of a <see cref="IDamageableComponent"/> have changed.
-    /// </summary>
-    public class HealthChangedEventArgs : EventArgs
-    {
-        /// <summary>
-        ///     Reference to the <see cref="IDamageableComponent"/> that invoked the event.
-        /// </summary>
-        public readonly IDamageableComponent Damageable;
-
-        /// <summary>
-        ///     List containing data on each <see cref="DamageType"/> that was changed.
-        /// </summary>
-        public readonly List<HealthChangeData> Data;
-
-        public HealthChangedEventArgs(IDamageableComponent damageable, List<HealthChangeData> data)
-        {
-            Damageable = damageable;
-            Data = data;
-        }
-
-        public HealthChangedEventArgs(IDamageableComponent damageable, DamageType type, int newValue, int delta)
-        {
-            Damageable = damageable;
-
-            var datum = new HealthChangeData(type, newValue, delta);
-            var data = new List<HealthChangeData> {datum};
-
-            Data = data;
-        }
-    }
-
-    /// <summary>
-    ///     Data class with information on how the value of a
-    ///     single <see cref="DamageType"/> has changed.
-    /// </summary>
-    public struct HealthChangeData
-    {
-        /// <summary>
-        ///     Type of damage that changed.
-        /// </summary>
-        public DamageType Type;
-
-        /// <summary>
-        ///     The new current value for that damage.
-        /// </summary>
-        public int NewValue;
-
-        /// <summary>
-        ///     How much the health value changed from its last value (negative is heals, positive is damage).
-        /// </summary>
-        public int Delta;
-
-        public HealthChangeData(DamageType type, int newValue, int delta)
-        {
-            Type = type;
-            NewValue = newValue;
-            Delta = delta;
-        }
     }
 }

Content.Shared/GameObjects/Components/Damage/IOnHealthChangedBehavior.cs

@@ -1,22 +0,0 @@
-using Robust.Shared.Interfaces.GameObjects;
-
-namespace Content.Shared.GameObjects.Components.Damage
-{
-    // TODO
-    /// <summary>
-    ///     Component interface that gets triggered after the values of a
-    ///     <see cref="IDamageableComponent"/> on the same <see cref="IEntity"/> change.
-    /// </summary>
-    public interface IOnHealthChangedBehavior
-    {
-        /// <summary>
-        ///     Called when the entity's <see cref="IDamageableComponent"/>
-        ///     is healed or hurt.
-        ///     Of note is that a "deal 0 damage" call will still trigger
-        ///     this function (including both damage negated by resistance or
-        ///     simply inputting 0 as the amount of damage to deal).
-        /// </summary>
-        /// <param name="e">Details of how the health changed.</param>
-        public void OnHealthChanged(HealthChangedEventArgs e);
-    }
-}

Content.Shared/GameObjects/Components/Mobs/DamageStateHelpers.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+
+namespace Content.Shared.GameObjects.Components.Mobs
+{
+    public static class DamageStateHelpers
+    {
+        /// <summary>
+        ///     Enumerates over <see cref="DamageState"/>, returning them in order
+        ///     of alive to dead.
+        /// </summary>
+        /// <returns>An enumerable of <see cref="DamageState"/>.</returns>
+        public static IEnumerable<DamageState> AliveToDead()
+        {
+            foreach (DamageState state in Enum.GetValues(typeof(DamageState)))
+            {
+                if (state == DamageState.Invalid)
+                {
+                    continue;
+                }
+
+                yield return state;
+            }
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/DamageStateVisuals.cs

@@ -0,0 +1,28 @@
+using System;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Mobs
+{
+    [Serializable, NetSerializable]
+    public enum DamageStateVisuals
+    {
+        State
+    }
+
+    /// <summary>
+    ///     Defines what state an <see cref="IEntity"/> is in.
+    ///
+    ///     Ordered from most alive to least alive.
+    ///     To enumerate them in this way see
+    ///     <see cref="DamageStateHelpers.AliveToDead"/>.
+    /// </summary>
+    [Serializable, NetSerializable]
+    public enum DamageState : byte
+    {
+        Invalid = 0,
+        Alive = 1,
+        Critical = 2,
+        Dead = 3
+    }
+}

Content.Shared/GameObjects/Components/Mobs/SharedDamageState.cs

@@ -1,11 +0,0 @@
-using System;
-using Robust.Shared.Serialization;
-
-namespace Content.Shared.GameObjects.Components.Mobs
-{
-    [Serializable, NetSerializable]
-    public enum DamageStateVisuals
-    {
-        State
-    }
-}

Content.Shared/GameObjects/Components/Mobs/State/BaseMobState.cs

@@ -0,0 +1,98 @@
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    public abstract class BaseMobState : IMobState
+    {
+        protected abstract DamageState DamageState { get; }
+
+        public virtual bool IsAlive()
+        {
+            return DamageState == DamageState.Alive;
+        }
+
+        public virtual bool IsCritical()
+        {
+            return DamageState == DamageState.Critical;
+        }
+
+        public virtual bool IsDead()
+        {
+            return DamageState == DamageState.Dead;
+        }
+
+        public virtual bool IsIncapacitated()
+        {
+            return IsCritical() || IsDead();
+        }
+
+        public virtual void EnterState(IEntity entity) { }
+
+        public virtual void ExitState(IEntity entity) { }
+
+        public virtual void UpdateState(IEntity entity, int threshold) { }
+
+        public virtual void ExposeData(ObjectSerializer serializer) { }
+
+        public virtual bool CanInteract()
+        {
+            return true;
+        }
+
+        public virtual bool CanMove()
+        {
+            return true;
+        }
+
+        public virtual bool CanUse()
+        {
+            return true;
+        }
+
+        public virtual bool CanThrow()
+        {
+            return true;
+        }
+
+        public virtual bool CanSpeak()
+        {
+            return true;
+        }
+
+        public virtual bool CanDrop()
+        {
+            return true;
+        }
+
+        public virtual bool CanPickup()
+        {
+            return true;
+        }
+
+        public virtual bool CanEmote()
+        {
+            return true;
+        }
+
+        public virtual bool CanAttack()
+        {
+            return true;
+        }
+
+        public virtual bool CanEquip()
+        {
+            return true;
+        }
+
+        public virtual bool CanUnequip()
+        {
+            return true;
+        }
+
+        public virtual bool CanChangeDirection()
+        {
+            return true;
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/IMobState.cs

@@ -1,6 +1,6 @@
-using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.EntitySystems;
-using Content.Shared.GameObjects.EntitySystems;
 using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Serialization;
 
 namespace Content.Shared.GameObjects.Components.Mobs.State
 {
@@ -9,8 +9,21 @@ namespace Content.Shared.GameObjects.Components.Mobs.State
     ///     (i.e. Normal, Critical, Dead) and what effects to apply upon entering or
     ///     exiting the state.
     /// </summary>
-    public interface IMobState : IActionBlocker
+    public interface IMobState : IExposeData, IActionBlocker
     {
+        bool IsAlive();
+
+        bool IsCritical();
+
+        bool IsDead();
+
+        /// <summary>
+        ///     Checks if the mob is in a critical or dead state.
+        ///     See <see cref="IsCritical"/> and <see cref="IsDead"/>.
+        /// </summary>
+        /// <returns>true if it is, false otherwise.</returns>
+        bool IsIncapacitated();
+
         /// <summary>
         ///     Called when this state is entered.
         /// </summary>
@@ -24,6 +37,6 @@ namespace Content.Shared.GameObjects.Components.Mobs.State
         /// <summary>
         ///     Called when this state is updated.
         /// </summary>
-        void UpdateState(IEntity entity);
+        void UpdateState(IEntity entity, int threshold);
     }
 }

Content.Shared/GameObjects/Components/Mobs/State/IMobStateComponent.cs

@@ -0,0 +1,28 @@
+#nullable enable
+using System.Diagnostics.CodeAnalysis;
+using Robust.Shared.Interfaces.GameObjects;
+
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    public interface IMobStateComponent : IComponent
+    {
+        IMobState? CurrentState { get; }
+
+        bool IsAlive();
+
+        bool IsCritical();
+
+        bool IsDead();
+
+        bool IsIncapacitated();
+
+        (IMobState state, int threshold)? GetEarliestIncapacitatedState(int minimumDamage);
+
+        bool TryGetEarliestIncapacitatedState(
+            int minimumDamage,
+            [NotNullWhen(true)] out IMobState? state,
+            out int threshold);
+
+        void UpdateState(int damage, bool syncing = false);
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/MobStateChangedMessage.cs

@@ -0,0 +1,27 @@
+#nullable enable
+using Robust.Shared.GameObjects;
+using Robust.Shared.Interfaces.GameObjects;
+
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    public class MobStateChangedMessage : ComponentMessage
+    {
+        public MobStateChangedMessage(
+            IMobStateComponent component,
+            IMobState? oldMobState,
+            IMobState currentMobState)
+        {
+            Component = component;
+            OldMobState = oldMobState;
+            CurrentMobState = currentMobState;
+        }
+
+        public IEntity Entity => Component.Owner;
+
+        public IMobStateComponent Component { get; }
+
+        public IMobState? OldMobState { get; }
+
+        public IMobState CurrentMobState { get; }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/SharedCriticalMobState.cs

@@ -0,0 +1,92 @@
+using Content.Shared.Alert;
+using Content.Shared.GameObjects.EntitySystems;
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    /// <summary>
+    ///     A state in which an entity is disabled from acting due to sufficient damage (considered unconscious).
+    /// </summary>
+    public abstract class SharedCriticalMobState : BaseMobState
+    {
+        protected override DamageState DamageState => DamageState.Critical;
+
+        public override void EnterState(IEntity entity)
+        {
+            base.EnterState(entity);
+
+            if (entity.TryGetComponent(out SharedAlertsComponent status))
+            {
+                status.ShowAlert(AlertType.HumanCrit); // TODO: combine humancrit-0 and humancrit-1 into a gif and display it
+            }
+        }
+
+        public override void ExitState(IEntity entity)
+        {
+            base.ExitState(entity);
+
+            EntitySystem.Get<SharedStandingStateSystem>().Standing(entity);
+        }
+
+        public override bool CanInteract()
+        {
+            return false;
+        }
+
+        public override bool CanMove()
+        {
+            return false;
+        }
+
+        public override bool CanUse()
+        {
+            return false;
+        }
+
+        public override bool CanThrow()
+        {
+            return false;
+        }
+
+        public override bool CanSpeak()
+        {
+            return false;
+        }
+
+        public override bool CanDrop()
+        {
+            return false;
+        }
+
+        public override bool CanPickup()
+        {
+            return false;
+        }
+
+        public override bool CanEmote()
+        {
+            return false;
+        }
+
+        public override bool CanAttack()
+        {
+            return false;
+        }
+
+        public override bool CanEquip()
+        {
+            return false;
+        }
+
+        public override bool CanUnequip()
+        {
+            return false;
+        }
+
+        public override bool CanChangeDirection()
+        {
+            return false;
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/SharedCriticalState.cs

@@ -1,76 +0,0 @@
-using Robust.Shared.Interfaces.GameObjects;
-
-namespace Content.Shared.GameObjects.Components.Mobs.State
-{
-    /// <summary>
-    ///     A state in which an entity is disabled from acting due to sufficient damage (considered unconscious).
-    /// </summary>
-    public abstract class SharedCriticalState : IMobState
-    {
-        public abstract void EnterState(IEntity entity);
-
-        public abstract void ExitState(IEntity entity);
-
-        public abstract void UpdateState(IEntity entity);
-
-        public bool CanInteract()
-        {
-            return false;
-        }
-
-        public bool CanMove()
-        {
-            return false;
-        }
-
-        public bool CanUse()
-        {
-            return false;
-        }
-
-        public bool CanThrow()
-        {
-            return false;
-        }
-
-        public bool CanSpeak()
-        {
-            return false;
-        }
-
-        public bool CanDrop()
-        {
-            return false;
-        }
-
-        public bool CanPickup()
-        {
-            return false;
-        }
-
-        public bool CanEmote()
-        {
-            return false;
-        }
-
-        public bool CanAttack()
-        {
-            return false;
-        }
-
-        public bool CanEquip()
-        {
-            return false;
-        }
-
-        public bool CanUnequip()
-        {
-            return false;
-        }
-
-        public bool CanChangeDirection()
-        {
-            return false;
-        }
-    }
-}

Content.Shared/GameObjects/Components/Mobs/State/SharedDeadMobState.cs

@@ -0,0 +1,77 @@
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    public abstract class SharedDeadMobState : BaseMobState
+    {
+        protected override DamageState DamageState => DamageState.Dead;
+
+        public override bool CanInteract()
+        {
+            return false;
+        }
+
+        public override bool CanMove()
+        {
+            return false;
+        }
+
+        public override bool CanUse()
+        {
+            return false;
+        }
+
+        public override bool CanThrow()
+        {
+            return false;
+        }
+
+        public override bool CanSpeak()
+        {
+            return false;
+        }
+
+        public override bool CanDrop()
+        {
+            return false;
+        }
+
+        public override bool CanPickup()
+        {
+            return false;
+        }
+
+        public override bool CanEmote()
+        {
+            return false;
+        }
+
+        public override bool CanAttack()
+        {
+            return false;
+        }
+
+        public override bool CanEquip()
+        {
+            return false;
+        }
+
+        public override bool CanUnequip()
+        {
+            return false;
+        }
+
+        public override bool CanChangeDirection()
+        {
+            return false;
+        }
+
+        public bool CanShiver()
+        {
+            return false;
+        }
+
+        public bool CanSweat()
+        {
+            return false;
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/SharedDeadState.cs

@@ -1,76 +0,0 @@
-using Robust.Shared.Interfaces.GameObjects;
-
-namespace Content.Shared.GameObjects.Components.Mobs.State
-{
-    public abstract class SharedDeadState : IMobState
-    {
-        public abstract void EnterState(IEntity entity);
-
-        public abstract void ExitState(IEntity entity);
-
-        public abstract void UpdateState(IEntity entity);
-
-        public bool CanInteract()
-        {
-            return false;
-        }
-
-        public bool CanMove()
-        {
-            return false;
-        }
-
-        public bool CanUse()
-        {
-            return false;
-        }
-
-        public bool CanThrow()
-        {
-            return false;
-        }
-
-        public bool CanSpeak()
-        {
-            return false;
-        }
-
-        public bool CanDrop()
-        {
-            return false;
-        }
-
-        public bool CanPickup()
-        {
-            return false;
-        }
-
-        public bool CanEmote()
-        {
-            return false;
-        }
-
-        public bool CanAttack()
-        {
-            return false;
-        }
-
-        public bool CanEquip()
-        {
-            return false;
-        }
-
-        public bool CanUnequip()
-        {
-            return false;
-        }
-
-        public bool CanChangeDirection()
-        {
-            return false;
-        }
-
-        public bool CanShiver() => false;
-        public bool CanSweat() => false;
-    }
-}

Content.Shared/GameObjects/Components/Mobs/State/SharedMobStateComponent.cs

@@ -0,0 +1,345 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using Content.Shared.Alert;
+using Content.Shared.GameObjects.Components.Damage;
+using Content.Shared.GameObjects.EntitySystems;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    /// <summary>
+    ///     When attached to an <see cref="IDamageableComponent"/>,
+    ///     this component will handle critical and death behaviors for mobs.
+    ///     Additionally, it handles sending effects to clients
+    ///     (such as blur effect for unconsciousness) and managing the health HUD.
+    /// </summary>
+    public abstract class SharedMobStateComponent : Component, IMobStateComponent, IActionBlocker
+    {
+        public override string Name => "MobState";
+
+        public override uint? NetID => ContentNetIDs.MOB_STATE;
+
+        /// <summary>
+        ///     States that this <see cref="SharedMobStateComponent"/> mapped to
+        ///     the amount of damage at which they are triggered.
+        ///     A threshold is reached when the total damage of an entity is equal
+        ///     to or higher than the int key, but lower than the next threshold.
+        ///     Ordered from lowest to highest.
+        /// </summary>
+        [ViewVariables]
+        private SortedDictionary<int, IMobState> _lowestToHighestStates = default!;
+
+        // TODO Remove Nullability?
+        [ViewVariables]
+        public IMobState? CurrentState { get; private set; }
+
+        [ViewVariables]
+        public int? CurrentThreshold { get; private set; }
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+
+            serializer.DataReadWriteFunction(
+                "thresholds",
+                new Dictionary<int, IMobState>(),
+                thresholds =>
+                {
+                    _lowestToHighestStates = new SortedDictionary<int, IMobState>(thresholds);
+                },
+                () => new Dictionary<int, IMobState>(_lowestToHighestStates));
+        }
+
+        protected override void Startup()
+        {
+            base.Startup();
+
+            if (CurrentState != null && CurrentThreshold != null)
+            {
+                UpdateState(null, (CurrentState, CurrentThreshold.Value));
+            }
+        }
+
+        public override void OnRemove()
+        {
+            if (Owner.TryGetComponent(out SharedAlertsComponent? status))
+            {
+                status.ClearAlert(AlertType.HumanHealth);
+            }
+
+            base.OnRemove();
+        }
+
+        public override ComponentState GetComponentState()
+        {
+            return new MobStateComponentState(CurrentThreshold);
+        }
+
+        public override void HandleComponentState(ComponentState? curState, ComponentState? nextState)
+        {
+            base.HandleComponentState(curState, nextState);
+
+            if (curState is not MobStateComponentState state)
+            {
+                return;
+            }
+
+            if (CurrentThreshold == state.CurrentThreshold)
+            {
+                return;
+            }
+
+            if (state.CurrentThreshold == null)
+            {
+                RemoveState(true);
+            }
+            else
+            {
+                UpdateState(state.CurrentThreshold.Value, true);
+            }
+        }
+
+        public override void HandleMessage(ComponentMessage message, IComponent? component)
+        {
+            base.HandleMessage(message, component);
+
+            switch (message)
+            {
+                case DamageChangedMessage msg:
+                    if (msg.Damageable.Owner != Owner)
+                    {
+                        break;
+                    }
+
+                    UpdateState(msg.Damageable.TotalDamage);
+
+                    break;
+            }
+        }
+
+        public bool IsAlive()
+        {
+            return CurrentState?.IsAlive() ?? false;
+        }
+
+        public bool IsCritical()
+        {
+            return CurrentState?.IsCritical() ?? false;
+        }
+
+        public bool IsDead()
+        {
+            return CurrentState?.IsDead() ?? false;
+        }
+
+        public bool IsIncapacitated()
+        {
+            return CurrentState?.IsIncapacitated() ?? false;
+        }
+
+        public (IMobState state, int threshold)? GetState(int damage)
+        {
+            foreach (var (threshold, state) in _lowestToHighestStates.Reverse())
+            {
+                if (damage >= threshold)
+                {
+                    return (state, threshold);
+                }
+            }
+
+            return null;
+        }
+
+        public bool TryGetState(
+            int damage,
+            [NotNullWhen(true)] out IMobState? state,
+            out int threshold)
+        {
+            var highestState = GetState(damage);
+
+            if (highestState == null)
+            {
+                state = default;
+                threshold = default;
+                return false;
+            }
+
+            (state, threshold) = highestState.Value;
+            return true;
+        }
+
+        public (IMobState state, int threshold)? GetEarliestIncapacitatedState(int minimumDamage)
+        {
+            foreach (var (threshold, state) in _lowestToHighestStates)
+            {
+                if (!state.IsIncapacitated())
+                {
+                    continue;
+                }
+
+                if (threshold < minimumDamage)
+                {
+                    continue;
+                }
+
+                return (state, threshold);
+            }
+
+            return null;
+        }
+
+        public bool TryGetEarliestIncapacitatedState(
+            int minimumDamage,
+            [NotNullWhen(true)] out IMobState? state,
+            out int threshold)
+        {
+            var earliestState = GetEarliestIncapacitatedState(minimumDamage);
+
+            if (earliestState == null)
+            {
+                state = default;
+                threshold = default;
+                return false;
+            }
+
+            (state, threshold) = earliestState.Value;
+            return true;
+        }
+
+        private void RemoveState(bool syncing = false)
+        {
+            var old = CurrentState;
+            CurrentState = null;
+            CurrentThreshold = null;
+
+            UpdateState(old, null);
+
+            if (!syncing)
+            {
+                Dirty();
+            }
+        }
+
+        public void UpdateState(int damage, bool syncing = false)
+        {
+            if (!TryGetState(damage, out var newState, out var threshold))
+            {
+                return;
+            }
+
+            UpdateState(CurrentState, (newState, threshold));
+
+            if (!syncing)
+            {
+                Dirty();
+            }
+        }
+
+        private void UpdateState(IMobState? old, (IMobState state, int threshold)? current)
+        {
+            if (!current.HasValue)
+            {
+                old?.ExitState(Owner);
+                return;
+            }
+
+            var (state, threshold) = current.Value;
+
+            CurrentThreshold = threshold;
+
+            if (state == old)
+            {
+                state.UpdateState(Owner, threshold);
+                return;
+            }
+
+            old?.ExitState(Owner);
+
+            CurrentState = state;
+
+            state.EnterState(Owner);
+            state.UpdateState(Owner, threshold);
+
+            var message = new MobStateChangedMessage(this, old, state);
+
+            SendMessage(message);
+        }
+
+        bool IActionBlocker.CanInteract()
+        {
+            return CurrentState?.CanInteract() ?? true;
+        }
+
+        bool IActionBlocker.CanMove()
+        {
+            return CurrentState?.CanMove() ?? true;
+        }
+
+        bool IActionBlocker.CanUse()
+        {
+            return CurrentState?.CanUse() ?? true;
+        }
+
+        bool IActionBlocker.CanThrow()
+        {
+            return CurrentState?.CanThrow() ?? true;
+        }
+
+        bool IActionBlocker.CanSpeak()
+        {
+            return CurrentState?.CanSpeak() ?? true;
+        }
+
+        bool IActionBlocker.CanDrop()
+        {
+            return CurrentState?.CanDrop() ?? true;
+        }
+
+        bool IActionBlocker.CanPickup()
+        {
+            return CurrentState?.CanPickup() ?? true;
+        }
+
+        bool IActionBlocker.CanEmote()
+        {
+            return CurrentState?.CanEmote() ?? true;
+        }
+
+        bool IActionBlocker.CanAttack()
+        {
+            return CurrentState?.CanAttack() ?? true;
+        }
+
+        bool IActionBlocker.CanEquip()
+        {
+            return CurrentState?.CanEquip() ?? true;
+        }
+
+        bool IActionBlocker.CanUnequip()
+        {
+            return CurrentState?.CanUnequip() ?? true;
+        }
+
+        bool IActionBlocker.CanChangeDirection()
+        {
+            return CurrentState?.CanChangeDirection() ?? true;
+        }
+    }
+
+    [Serializable, NetSerializable]
+    public class MobStateComponentState : ComponentState
+    {
+        public readonly int? CurrentThreshold;
+
+        public MobStateComponentState(int? currentThreshold) : base(ContentNetIDs.MOB_STATE)
+        {
+            CurrentThreshold = currentThreshold;
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/SharedMobStateManagerComponent.cs

@@ -1,122 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Content.Shared.GameObjects.Components.Damage;
-using Content.Shared.GameObjects.EntitySystems;
-using Robust.Shared.GameObjects;
-using Robust.Shared.Serialization;
-
-namespace Content.Shared.GameObjects.Components.Mobs.State
-{
-    /// <summary>
-    ///     When attacked to an <see cref="IDamageableComponent"/>, this component will
-    ///     handle critical and death behaviors for mobs.
-    ///     Additionally, it handles sending effects to clients
-    ///     (such as blur effect for unconsciousness) and managing the health HUD.
-    /// </summary>
-    public abstract class SharedMobStateManagerComponent : Component, IOnHealthChangedBehavior, IActionBlocker
-    {
-        public override string Name => "MobStateManager";
-
-        public override uint? NetID => ContentNetIDs.MOB_STATE_MANAGER;
-
-        protected abstract IReadOnlyDictionary<DamageState, IMobState> Behavior { get; }
-
-        public virtual IMobState CurrentMobState { get; protected set; }
-
-        public virtual DamageState CurrentDamageState { get; protected set; }
-
-        public override void Initialize()
-        {
-            base.Initialize();
-
-            CurrentDamageState = DamageState.Alive;
-            CurrentMobState = Behavior[CurrentDamageState];
-            CurrentMobState.EnterState(Owner);
-            CurrentMobState.UpdateState(Owner);
-        }
-
-        bool IActionBlocker.CanInteract()
-        {
-            return CurrentMobState.CanInteract();
-        }
-
-        bool IActionBlocker.CanMove()
-        {
-            return CurrentMobState.CanMove();
-        }
-
-        bool IActionBlocker.CanUse()
-        {
-            return CurrentMobState.CanUse();
-        }
-
-        bool IActionBlocker.CanThrow()
-        {
-            return CurrentMobState.CanThrow();
-        }
-
-        bool IActionBlocker.CanSpeak()
-        {
-            return CurrentMobState.CanSpeak();
-        }
-
-        bool IActionBlocker.CanDrop()
-        {
-            return CurrentMobState.CanDrop();
-        }
-
-        bool IActionBlocker.CanPickup()
-        {
-            return CurrentMobState.CanPickup();
-        }
-
-        bool IActionBlocker.CanEmote()
-        {
-            return CurrentMobState.CanEmote();
-        }
-
-        bool IActionBlocker.CanAttack()
-        {
-            return CurrentMobState.CanAttack();
-        }
-
-        bool IActionBlocker.CanEquip()
-        {
-            return CurrentMobState.CanEquip();
-        }
-
-        bool IActionBlocker.CanUnequip()
-        {
-            return CurrentMobState.CanUnequip();
-        }
-
-        bool IActionBlocker.CanChangeDirection()
-        {
-            return CurrentMobState.CanChangeDirection();
-        }
-
-        public void OnHealthChanged(HealthChangedEventArgs e)
-        {
-            if (e.Damageable.CurrentState != CurrentDamageState)
-            {
-                CurrentDamageState = e.Damageable.CurrentState;
-                CurrentMobState.ExitState(Owner);
-                CurrentMobState = Behavior[CurrentDamageState];
-                CurrentMobState.EnterState(Owner);
-            }
-
-            CurrentMobState.UpdateState(Owner);
-        }
-    }
-
-    [Serializable, NetSerializable]
-    public class MobStateManagerComponentState : ComponentState
-    {
-        public readonly DamageState DamageState;
-
-        public MobStateManagerComponentState(DamageState damageState) : base(ContentNetIDs.MOB_STATE_MANAGER)
-        {
-            DamageState = damageState;
-        }
-    }
-}

Content.Shared/GameObjects/Components/Mobs/State/SharedNormalMobState.cs

@@ -0,0 +1,70 @@
+namespace Content.Shared.GameObjects.Components.Mobs.State
+{
+    /// <summary>
+    ///     The standard state an entity is in; no negative effects.
+    /// </summary>
+    public abstract class SharedNormalMobState : BaseMobState
+    {
+        protected override DamageState DamageState => DamageState.Alive;
+
+        public override bool CanInteract()
+        {
+            return true;
+        }
+
+        public override bool CanMove()
+        {
+            return true;
+        }
+
+        public override bool CanUse()
+        {
+            return true;
+        }
+
+        public override bool CanThrow()
+        {
+            return true;
+        }
+
+        public override bool CanSpeak()
+        {
+            return true;
+        }
+
+        public override bool CanDrop()
+        {
+            return true;
+        }
+
+        public override bool CanPickup()
+        {
+            return true;
+        }
+
+        public override bool CanEmote()
+        {
+            return true;
+        }
+
+        public override bool CanAttack()
+        {
+            return true;
+        }
+
+        public override bool CanEquip()
+        {
+            return true;
+        }
+
+        public override bool CanUnequip()
+        {
+            return true;
+        }
+
+        public override bool CanChangeDirection()
+        {
+            return true;
+        }
+    }
+}

Content.Shared/GameObjects/Components/Mobs/State/SharedNormalState.cs

@@ -1,76 +0,0 @@
-using Robust.Shared.Interfaces.GameObjects;
-
-namespace Content.Shared.GameObjects.Components.Mobs.State
-{
-    /// <summary>
-    ///     The standard state an entity is in; no negative effects.
-    /// </summary>
-    public abstract class SharedNormalState : IMobState
-    {
-        public abstract void EnterState(IEntity entity);
-
-        public abstract void ExitState(IEntity entity);
-
-        public abstract void UpdateState(IEntity entity);
-
-        public bool CanInteract()
-        {
-            return true;
-        }
-
-        public bool CanMove()
-        {
-            return true;
-        }
-
-        public bool CanUse()
-        {
-            return true;
-        }
-
-        public bool CanThrow()
-        {
-            return true;
-        }
-
-        public bool CanSpeak()
-        {
-            return true;
-        }
-
-        public bool CanDrop()
-        {
-            return true;
-        }
-
-        public bool CanPickup()
-        {
-            return true;
-        }
-
-        public bool CanEmote()
-        {
-            return true;
-        }
-
-        public bool CanAttack()
-        {
-            return true;
-        }
-
-        public bool CanEquip()
-        {
-            return true;
-        }
-
-        public bool CanUnequip()
-        {
-            return true;
-        }
-
-        public bool CanChangeDirection()
-        {
-            return true;
-        }
-    }
-}

Content.Shared/GameObjects/ContentNetIDs.cs

@@ -73,7 +73,7 @@
         public const uint BATTERY_BARREL = 1067;
         public const uint SUSPICION_ROLE = 1068;
         public const uint ROTATION = 1069;
-        public const uint MOB_STATE_MANAGER = 1070;
+        public const uint MOB_STATE = 1070;
         public const uint SLIP = 1071;
         public const uint SPACE_VILLAIN_ARCADE = 1072;
         public const uint BLOCKGAME_ARCADE = 1073;
@@ -86,6 +86,7 @@
         public const uint SINGULARITY = 1080;
         public const uint CHARACTERINFO = 1081;
         public const uint REAGENT_GRINDER = 1082;
+        public const uint DAMAGEABLE = 1083;
 
         // Net IDs for integration tests.
         public const uint PREDICTION_TEST = 10001;

Content.Shared/GameObjects/EntitySystems/ActSystem.cs

@@ -8,7 +8,7 @@ using Robust.Shared.Map;
 namespace Content.Shared.GameObjects.EntitySystems
 {
     /// <summary>
-    /// This interface gives components behavior on getting destoyed.
+    /// This interface gives components behavior on getting destroyed.
     /// </summary>
     public interface IDestroyAct
     {
@@ -21,7 +21,6 @@ namespace Content.Shared.GameObjects.EntitySystems
     public class DestructionEventArgs : EventArgs
     {
         public IEntity Owner { get; set; }
-        public bool IsSpawnWreck { get; set; }
     }
 
     public class BreakageEventArgs : EventArgs
@@ -55,19 +54,20 @@ namespace Content.Shared.GameObjects.EntitySystems
     [UsedImplicitly]
     public sealed class ActSystem : EntitySystem
     {
-        public void HandleDestruction(IEntity owner, bool isWreck)
+        public void HandleDestruction(IEntity owner)
         {
             var eventArgs = new DestructionEventArgs
             {
-                Owner = owner,
+                Owner = owner
-                IsSpawnWreck = isWreck
             };
+
             var destroyActs = owner.GetAllComponents<IDestroyAct>().ToList();
 
             foreach (var destroyAct in destroyActs)
             {
                 destroyAct.OnDestroy(eventArgs);
             }
+
             owner.Delete();
         }
 

Resources/Prototypes/Body/Parts/humanoid_parts.yml

@@ -1,3 +1,4 @@
+# TODO BODY: Part damage
 - type: entity
   id: PartHuman
   name: "human body part"
@@ -30,8 +31,8 @@
     # TODO BODY DettachableDamageableComponent?
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 100
+#    criticalThreshold: 100
-    deadThreshold: 150
+#    deadThreshold: 150
 
 - type: entity
   id: HeadHuman
@@ -57,8 +58,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 50
+#    criticalThreshold: 50
-    deadThreshold: 120
+#    deadThreshold: 120
 
 - type: entity
   id: LeftArmHuman
@@ -81,8 +82,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 40
+#    criticalThreshold: 40
-    deadThreshold: 80
+#    deadThreshold: 80
   - type: Extension
     distance: 2.4
 
@@ -107,8 +108,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 40
+#    criticalThreshold: 40
-    deadThreshold: 80
+#    deadThreshold: 80
   - type: Extension
     distance: 2.4
 
@@ -133,8 +134,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 30
+#    criticalThreshold: 30
-    deadThreshold: 60
+#    deadThreshold: 60
   - type: Grasp
 
 - type: entity
@@ -151,8 +152,6 @@
     state: "r_hand"
   - type: BodyPart
     partType: Hand
-    durability: 30
-    destroyThreshold: -60
     size: 3
     compatibility: Biological
     symmetry: Right
@@ -160,8 +159,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 30
+#    criticalThreshold: 30
-    deadThreshold: 60
+#    deadThreshold: 60
   - type: Grasp
 
 - type: entity
@@ -185,8 +184,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 45
+#    criticalThreshold: 45
-    deadThreshold: 90
+#    deadThreshold: 90
   - type: Leg
     speed: 2.6
   - type: Extension
@@ -206,8 +205,6 @@
     state: "r_leg"
   - type: BodyPart
     partType: Leg
-    durability: 45
-    destroyThreshold: -90
     size: 6
     compatibility: Biological
     symmetry: Right
@@ -215,8 +212,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 45
+#    criticalThreshold: 45
-    deadThreshold: 90
+#    deadThreshold: 90
   - type: Leg
     speed: 2.6
   - type: Extension
@@ -243,8 +240,8 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 30
+#    criticalThreshold: 30
-    deadThreshold: 60
+#    deadThreshold: 60
 
 - type: entity
   id: RightFootHuman
@@ -267,5 +264,5 @@
   - type: Damageable
     damageContainer: biologicalDamageContainer
     resistances: defaultResistances
-    criticalThreshold: 30
+#    criticalThreshold: 30
-    deadThreshold: 60
+#    deadThreshold: 60

Resources/Prototypes/Damage/damage_containers.yml

@@ -1,6 +1,6 @@
 - type: damageContainer
   id: biologicalDamageContainer
-  activeDamageClasses:
+  supportedClasses:
   - Brute
   - Burn
   - Toxin
@@ -9,6 +9,6 @@
 
 - type: damageContainer
   id: metallicDamageContainer
-  activeDamageClasses:
+  supportedClasses:
   - Brute
   - Burn

Resources/Prototypes/Entities/Constructible/Doors/airlock_base.yml

@@ -56,9 +56,12 @@
   - type: Occluder
   - type: SnapGrid
     offset: Center
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 500
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      500:
+        Acts: ["Destruction"]
   placement:
     mode: SnapgridCenter
 

Resources/Prototypes/Entities/Constructible/Furniture/beds.yml

@@ -27,8 +27,11 @@
   - type: Strap
     position: Down
     rotation: -90
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 75
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      75:
+        Acts: ["Destruction"]
   placement:
     mode: SnapgridCenter

Resources/Prototypes/Entities/Constructible/Furniture/bookshelf.yml

@@ -19,14 +19,17 @@
       - MobImpassable
       - VaultImpassable
       - SmallImpassable
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 30
-    destroySound: /Audio/Effects/woodhit.ogg
-    spawnOnDestroy:
-      WoodPlank:
-        Min: 1
-        Max: 1
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      30:
+        Sound: /Audio/Effects/woodhit.ogg
+        Spawn:
+          WoodPlank:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Occluder
     sizeX: 32
     sizeY: 32

Resources/Prototypes/Entities/Constructible/Furniture/instruments.yml

@@ -1,77 +1,80 @@
- - type: entity
+- type: entity
-   name: baseinstrument
+  name: baseinstrument
-   id: BasePlaceableInstrument
+  id: BasePlaceableInstrument
-   abstract: true
+  abstract: true
-   placement:
+  placement:
-     mode: SnapgridCenter
+    mode: SnapgridCenter
-   components:
+  components:
-   - type: Instrument
+  - type: Instrument
-     handheld: false
+    handheld: false
-   - type: Clickable
+  - type: Clickable
-   - type: InteractionOutline
+  - type: InteractionOutline
-   - type: Anchorable
+  - type: Anchorable
-   - type: Physics
+  - type: Physics
-     shapes:
+    shapes:
-       - !type:PhysShapeAabb
+      - !type:PhysShapeAabb
-         layer: [MobMask]
+        layer: [MobMask]
-         mask:
+        mask:
-           - Impassable
+          - Impassable
-           - MobImpassable
+          - MobImpassable
-           - VaultImpassable
+          - VaultImpassable
-   - type: SnapGrid
+  - type: SnapGrid
-     offset: Center
+    offset: Center
-   - type: Destructible
+  - type: Damageable
-     deadThreshold: 50
+    resistances: metallicResistances
-     resistances: metallicResistances
+  - type: Destructible
-   - type: UserInterface
+    thresholds:
-     interfaces:
+      50:
-     - key: enum.InstrumentUiKey.Key
+        Acts: ["Destruction"]
-       type: InstrumentBoundUserInterface
+  - type: UserInterface
+    interfaces:
+    - key: enum.InstrumentUiKey.Key
+      type: InstrumentBoundUserInterface
 
- - type: entity
+- type: entity
-   name: piano
+  name: piano
-   parent: BasePlaceableInstrument
+  parent: BasePlaceableInstrument
-   id: PianoInstrument
+  id: PianoInstrument
-   description: Play Needles Piano Now.
+  description: Play Needles Piano Now.
-   components:
+  components:
-   - type: Instrument
+  - type: Instrument
-     program: 1
+    program: 1
-   - type: Sprite
+  - type: Sprite
-     sprite: Objects/Fun/Instruments/otherinstruments.rsi
+    sprite: Objects/Fun/Instruments/otherinstruments.rsi
-     state: piano
+    state: piano
 
- - type: entity
+- type: entity
-   name: minimoog
+  name: minimoog
-   parent: BasePlaceableInstrument
+  parent: BasePlaceableInstrument
-   id: MinimoogInstrument
+  id: MinimoogInstrument
-   description: 'This is a minimoog, like a space piano, but more spacey!'
+  description: 'This is a minimoog, like a space piano, but more spacey!'
-   components:
+  components:
-   - type: Instrument
+  - type: Instrument
-     program: 81
+    program: 81
-   - type: Sprite
+  - type: Sprite
-     sprite: Objects/Fun/Instruments/otherinstruments.rsi
+    sprite: Objects/Fun/Instruments/otherinstruments.rsi
-     state: minimoog
+    state: minimoog
 
- - type: entity
+- type: entity
-   name: church organ
+  name: church organ
-   parent: BasePlaceableInstrument
+  parent: BasePlaceableInstrument
-   id: ChurchOrganInstrument
+  id: ChurchOrganInstrument
-   description: This thing really blows!
+  description: This thing really blows!
-   components:
+  components:
-   - type: Instrument
+  - type: Instrument
-     program: 20
+    program: 20
-   - type: Sprite
+  - type: Sprite
-     sprite: Objects/Fun/Instruments/otherinstruments.rsi
+    sprite: Objects/Fun/Instruments/otherinstruments.rsi
-     state: church_organ
+    state: church_organ
 
- - type: entity
+- type: entity
-   name: xylophone
+  name: xylophone
-   parent: BasePlaceableInstrument
+  parent: BasePlaceableInstrument
-   id: XylophoneInstrument
+  id: XylophoneInstrument
-   description: Rainbow colored glockenspiel.
+  description: Rainbow colored glockenspiel.
-   components:
+  components:
-   - type: Instrument
+  - type: Instrument
-     program: 13
+    program: 13
-   - type: Sprite
+  - type: Sprite
-     sprite: Objects/Fun/Instruments/otherinstruments.rsi
+    sprite: Objects/Fun/Instruments/otherinstruments.rsi
-     state: xylophone
+    state: xylophone

Resources/Prototypes/Entities/Constructible/Furniture/pilot_chair.yml

@@ -11,9 +11,12 @@
   - type: Physics
   - type: Clickable
   - type: InteractionOutline
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 100
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      100:
+        Acts: ["Destruction"]
   - type: ShuttleController
   - type: Strap
     position: Stand

Resources/Prototypes/Entities/Constructible/Furniture/seats.yml

@@ -30,9 +30,12 @@
     position: Stand
   - type: Anchorable
   - type: Pullable
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 50
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      50:
+        Acts: ["Destruction"]
 
 - type: entity
   name: chair

Resources/Prototypes/Entities/Constructible/Furniture/storage.yml

@@ -27,14 +27,17 @@
       - VaultImpassable
   - type: Pullable
   - type: Anchorable
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 30
-    destroySound: /Audio/Effects/metalbreak.ogg
-    spawnOnDestroy:
-      SteelSheet1:
-        Min: 1
-        Max: 1
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      30:
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
 
 - type: entity
   id: Shelf
@@ -65,11 +68,14 @@
       - VaultImpassable
   - type: Pullable
   - type: Anchorable
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 30
-    destroySound: /Audio/Effects/metalbreak.ogg
-    spawnOnDestroy:
-      SteelSheet1:
-        Min: 1
-        Max: 1
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      30:
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]

Resources/Prototypes/Entities/Constructible/Furniture/tables.yml

@@ -35,14 +35,17 @@
     sprite: Constructible/Structures/Tables/generic.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/generic.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 15
-    destroySound: /Audio/Effects/metalbreak.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      SteelSheet1:
+    thresholds:
-        Min: 1
+      15:
-        Max: 1
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
 
 - type: entity
   id: TableFrame
@@ -54,14 +57,17 @@
     sprite: Constructible/Structures/Tables/frame.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/frame.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 1
-    destroySound: /Audio/Effects/metalbreak.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      SteelSheet1:
+    thresholds:
-        Min: 1
+      1:
-        Max: 1
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: TableFrame
@@ -76,14 +82,17 @@
     sprite: Constructible/Structures/Tables/bar.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/bar.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 1
-    destroySound: /Audio/Effects/metalbreak.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      SteelSheet1:
+    thresholds:
-        Min: 1
+      1:
-        Max: 1
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
 
 - type: entity
   id: TableMetal
@@ -95,14 +104,17 @@
     sprite: Constructible/Structures/Tables/metal.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/metal.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 15
-    destroySound: /Audio/Effects/metalbreak.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      SteelSheet1:
+    thresholds:
-        Min: 1
+      15:
-        Max: 1
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: MetalTable
@@ -117,14 +129,17 @@
     sprite: Constructible/Structures/Tables/reinforced.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/reinforced.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 75
-    destroySound: /Audio/Effects/metalbreak.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      SteelSheet1:
+    thresholds:
-        Min: 1
+      75:
-        Max: 1
+        Sound: /Audio/Effects/metalbreak.ogg
+        Spawn:
+          SteelSheet1:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: ReinforcedTable
@@ -139,14 +154,17 @@
     sprite: Constructible/Structures/Tables/glass.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/glass.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 5
-    destroySound: /Audio/Effects/glass_break2.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      ShardGlass:
+    thresholds:
-        Min: 1
+      5:
-        Max: 1
+        Sound: /Audio/Effects/glass_break2.ogg
+        Spawn:
+          ShardGlass:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: GlassTable
@@ -161,14 +179,17 @@
     sprite: Constructible/Structures/Tables/r_glass.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/r_glass.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 20
-    destroySound: /Audio/Effects/glass_break2.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      ShardGlass:
+    thresholds:
-        Min: 1
+      20:
-        Max: 1
+        Sound: /Audio/Effects/glass_break2.ogg
+        Spawn:
+          ShardGlass:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: RGlassTable
@@ -183,14 +204,17 @@
     sprite: Constructible/Structures/Tables/wood.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/wood.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 15
-    destroySound: /Audio/Effects/woodhit.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      WoodPlank:
+    thresholds:
-        Min: 1
+      15:
-        Max: 1
+        Sound: /Audio/Effects/woodhit.ogg
+        Spawn:
+          WoodPlank:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: WoodTable
@@ -205,14 +229,17 @@
     sprite: Constructible/Structures/Tables/carpet.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/carpet.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 15
-    destroySound: /Audio/Effects/woodhit.ogg
     resistances: metallicResistances
-    spawnOnDestroy:
+  - type: Destructible
-      WoodPlank:
+    thresholds:
-        Min: 1
+      15:
-        Max: 1
+        Sound: /Audio/Effects/woodhit.ogg
+        Spawn:
+          WoodPlank:
+            Min: 1
+            Max: 1
+        Acts: ["Destruction"]
   - type: Construction
     graph: Tables
     node: PokerTable
@@ -227,10 +254,13 @@
     sprite: Constructible/Structures/Tables/stone.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/stone.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 50
-    destroySound: /Audio/Effects/picaxe2.ogg
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      50:
+        Sound: /Audio/Effects/picaxe2.ogg
+        Acts: ["Destruction"]
 
 - type: entity
   id: TableDebug
@@ -242,6 +272,9 @@
     sprite: Constructible/Structures/Tables/debug.rsi
   - type: Icon
     sprite: Constructible/Structures/Tables/debug.rsi
-  - type: Destructible
+  - type: Damageable
-    deadThreshold: 1
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      1:
+        Acts: ["Destruction"]

Resources/Prototypes/Entities/Constructible/Ground/gascanisterports.yml

@@ -10,8 +10,11 @@
   - type: SnapGrid
     offset: Center
   - type: Sprite
+  - type: Damageable
   - type: Destructible
-    thresholdvalue: 100
+    thresholds:
+      100:
+        Acts: ["Destruction"]
   - type: GasCanisterPort
 
 - type: entity

Resources/Prototypes/Entities/Constructible/Ground/gascanisters.yml

@@ -10,8 +10,11 @@
   - type: SnapGrid
     offset: Center
   - type: Sprite
+  - type: Damageable
   - type: Destructible
-    thresholdvalue: 100
+    thresholds:
+      100:
+        Acts: ["Destruction"]
   - type: GasCanister
   - type: Anchorable
   - type: Pullable

Resources/Prototypes/Entities/Constructible/Ground/kitchen.yml

@@ -20,6 +20,9 @@
     state: spike
   - type: Anchorable
   - type: Pullable
+  - type: Damageable
   - type: Destructible
-    deadThreshold: 50
+    thresholds:
+      50:
+        Acts: ["Destruction"]
   - type: KitchenSpike

Resources/Prototypes/Entities/Constructible/Ground/pipes.yml

@@ -11,8 +11,11 @@
   - type: Physics
   - type: SnapGrid
     offset: Center
+  - type: Damageable
   - type: Destructible
-    thresholdvalue: 100
+    thresholds:
+      100:
+        Acts: ["Destruction"]
   - type: Sprite
   - type: Appearance
     visuals:

Resources/Prototypes/Entities/Constructible/Ground/pumps.yml

@@ -9,9 +9,12 @@
   - type: Physics
   - type: SnapGrid
     offset: Center
-  - type: Destructible
+  - type: Damageable
-    thresholdvalue: 100
     resistances: metallicResistances
+  - type: Destructible
+    thresholds:
+      100:
+        Acts: ["Destruction"]
   - type: Sprite
     sprite: Constructible/Atmos/pump.rsi
   - type: Icon