diff --git a/OpenRA.Game/Actor.cs b/OpenRA.Game/Actor.cs
index 6102305334..2fab1a1b8b 100644
--- a/OpenRA.Game/Actor.cs
+++ b/OpenRA.Game/Actor.cs
@@ -71,7 +71,7 @@ namespace OpenRA
 
 		IOccupySpace occupySpace;
 		readonly IFacing facing;
-		readonly Health health;
+		readonly IHealth health;
 		readonly IRenderModifier[] renderModifiers;
 		readonly IRender[] renders;
 		readonly IDisable[] disables;
@@ -103,7 +103,7 @@ namespace OpenRA
 			VisualBounds = DetermineVisualBounds();
 			EffectiveOwner = TraitOrDefault<IEffectiveOwner>();
 			facing = TraitOrDefault<IFacing>();
-			health = TraitOrDefault<Health>();
+			health = TraitOrDefault<IHealth>();
 			renderModifiers = TraitsImplementing<IRenderModifier>().ToArray();
 			renders = TraitsImplementing<IRender>().ToArray();
 			disables = TraitsImplementing<IDisable>().ToArray();
@@ -281,12 +281,28 @@ namespace OpenRA
 			});
 		}
 
-		public void Kill(Actor attacker)
+		public DamageState GetDamageState()
 		{
-			if (health == null)
+			if (Disposed)
+				return DamageState.Dead;
+
+			return (health == null) ? DamageState.Undamaged : health.DamageState;
+		}
+
+		public void InflictDamage(Actor attacker, int damage, IWarhead warhead)
+		{
+			if (Disposed || health == null)
 				return;
 
-			health.InflictDamage(this, attacker, health.MaxHP, null, true);
+			health.InflictDamage(this, attacker, damage, warhead, false);
+		}
+
+		public void Kill(Actor attacker)
+		{
+			if (Disposed || health == null)
+				return;
+
+			health.Kill(this, attacker);
 		}
 
 		public bool IsDisabled()
diff --git a/OpenRA.Game/Graphics/SelectionBarsRenderable.cs b/OpenRA.Game/Graphics/SelectionBarsRenderable.cs
index 45cf7b9e36..0443c3ad62 100644
--- a/OpenRA.Game/Graphics/SelectionBarsRenderable.cs
+++ b/OpenRA.Game/Graphics/SelectionBarsRenderable.cs
@@ -74,7 +74,7 @@ namespace OpenRA.Graphics
 			wlr.DrawLine(start + r, z + r, barColor2);
 		}
 
-		Color GetHealthColor(Health health)
+		Color GetHealthColor(IHealth health)
 		{
 			var player = actor.World.RenderPlayer ?? actor.World.LocalPlayer;
 
@@ -104,7 +104,7 @@ namespace OpenRA.Graphics
 					health.DamageState == DamageState.Heavy ? Color.Yellow : Color.LimeGreen;
 		}
 
-		void DrawHealthBar(WorldRenderer wr, Health health, float2 start, float2 end)
+		void DrawHealthBar(WorldRenderer wr, IHealth health, float2 start, float2 end)
 		{
 			if (health == null || health.IsDead)
 				return;
@@ -133,7 +133,7 @@ namespace OpenRA.Graphics
 			wlr.DrawLine(start + q, z + q, healthColor);
 			wlr.DrawLine(start + r, z + r, healthColor2);
 
-			if (health.DisplayHp != health.HP)
+			if (health.DisplayHP != health.HP)
 			{
 				var deltaColor = Color.OrangeRed;
 				var deltaColor2 = Color.FromArgb(
@@ -141,7 +141,7 @@ namespace OpenRA.Graphics
 					deltaColor.R / 2,
 					deltaColor.G / 2,
 					deltaColor.B / 2);
-				var zz = float2.Lerp(start, end, (float)health.DisplayHp / health.MaxHP);
+				var zz = float2.Lerp(start, end, (float)health.DisplayHP / health.MaxHP);
 
 				wlr.DrawLine(z + p, zz + p, deltaColor2);
 				wlr.DrawLine(z + q, zz + q, deltaColor);
@@ -155,7 +155,7 @@ namespace OpenRA.Graphics
 			if (!actor.IsInWorld || actor.IsDead)
 				return;
 
-			var health = actor.TraitOrDefault<Health>();
+			var health = actor.TraitOrDefault<IHealth>();
 
 			var screenPos = wr.ScreenPxPosition(pos);
 			var bounds = actor.VisualBounds;
diff --git a/OpenRA.Game/Traits/Health.cs b/OpenRA.Game/Traits/Health.cs
index 2771fab657..05821ded5a 100644
--- a/OpenRA.Game/Traits/Health.cs
+++ b/OpenRA.Game/Traits/Health.cs
@@ -26,15 +26,13 @@ namespace OpenRA.Traits
 		public virtual object Create(ActorInitializer init) { return new Health(init, this); }
 	}
 
-	public enum DamageState { Undamaged, Light, Medium, Heavy, Critical, Dead }
-
-	public class Health : ISync, ITick
+	public class Health : IHealth, ISync, ITick
 	{
 		public readonly HealthInfo Info;
 
 		[Sync] int hp;
 
-		public int DisplayHp { get; private set; }
+		public int DisplayHP { get; private set; }
 
 		public Health(ActorInitializer init, HealthInfo info)
 		{
@@ -43,11 +41,11 @@ namespace OpenRA.Traits
 
 			hp = init.Contains<HealthInit>() ? init.Get<HealthInit, int>() * MaxHP / 100 : MaxHP;
 
-			DisplayHp = hp;
+			DisplayHP = hp;
 		}
 
 		public int HP { get { return hp; } }
-		public int MaxHP;
+		public int MaxHP { get; private set; }
 
 		public bool IsDead { get { return hp <= 0; } }
 		public bool RemoveOnDeath = true;
@@ -162,13 +160,18 @@ namespace OpenRA.Traits
 			}
 		}
 
+		public void Kill(Actor self, Actor attacker)
+		{
+			InflictDamage(self, attacker, MaxHP, null, true);
+		}
+
 		public void Tick(Actor self)
 		{
-			if (hp > DisplayHp)
-				DisplayHp = hp;
+			if (hp > DisplayHP)
+				DisplayHP = hp;
 
-			if (DisplayHp > hp)
-				DisplayHp = (2 * DisplayHp + hp) / 3;
+			if (DisplayHP > hp)
+				DisplayHP = (2 * DisplayHP + hp) / 3;
 		}
 	}
 
@@ -191,24 +194,4 @@ namespace OpenRA.Traits
 			return value;
 		}
 	}
-
-	public static class HealthExts
-	{
-		public static DamageState GetDamageState(this Actor self)
-		{
-			if (self.Disposed)
-				return DamageState.Dead;
-
-			var health = self.TraitOrDefault<Health>();
-			return (health == null) ? DamageState.Undamaged : health.DamageState;
-		}
-
-		public static void InflictDamage(this Actor self, Actor attacker, int damage, IWarhead warhead)
-		{
-			if (self.Disposed) return;
-			var health = self.TraitOrDefault<Health>();
-			if (health == null) return;
-			health.InflictDamage(self, attacker, damage, warhead, false);
-		}
-	}
 }
diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index 95cd22a7dc..800317fdf4 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -19,6 +19,20 @@ using OpenRA.Primitives;
 
 namespace OpenRA.Traits
 {
+	public enum DamageState { Undamaged, Light, Medium, Heavy, Critical, Dead }
+
+	public interface IHealth
+	{
+		DamageState DamageState { get; }
+		int HP { get; }
+		int MaxHP { get; }
+		int DisplayHP { get; }
+		bool IsDead { get; }
+
+		void InflictDamage(Actor self, Actor attacker, int damage, IWarhead warhead, bool ignoreModifiers);
+		void Kill(Actor self, Actor attacker);
+	}
+
 	// depends on the order of pips in WorldRenderer.cs!
 	public enum PipType { Transparent, Green, Yellow, Red, Gray, Blue, Ammo, AmmoEmpty }
 	public enum TagType { None, Fake, Primary }