diff --git a/OpenRa.Game/OpenRa.Game.csproj b/OpenRa.Game/OpenRa.Game.csproj
index b1a4ae7ced..308239c03e 100644
--- a/OpenRa.Game/OpenRa.Game.csproj
+++ b/OpenRa.Game/OpenRa.Game.csproj
@@ -81,7 +81,6 @@
     <Compile Include="Effects\DelayedAction.cs" />
     <Compile Include="Effects\FlashTarget.cs" />
     <Compile Include="Effects\GpsSatellite.cs" />
-    <Compile Include="Effects\InvulnEffect.cs" />
     <Compile Include="Effects\MoveFlash.cs" />
     <Compile Include="Effects\RepairIndicator.cs" />
     <Compile Include="Effects\SatelliteLaunch.cs" />
@@ -218,8 +217,6 @@
     <Compile Include="Traits\Helicopter.cs" />
     <Compile Include="Traits\InvisibleToOthers.cs" />
     <Compile Include="Traits\ConstructionYard.cs" />
-    <Compile Include="Traits\IronCurtainable.cs" />
-    <Compile Include="Traits\IronCurtainPower.cs" />
     <Compile Include="Traits\JamsRadar.cs" />
     <Compile Include="Traits\LightPaletteRotator.cs" />
     <Compile Include="Traits\LimitedAmmo.cs" />
diff --git a/OpenRa.Game/Traits/RenderBuilding.cs b/OpenRa.Game/Traits/RenderBuilding.cs
index dea269569c..b47885e261 100644
--- a/OpenRa.Game/Traits/RenderBuilding.cs
+++ b/OpenRa.Game/Traits/RenderBuilding.cs
@@ -3,12 +3,12 @@ using OpenRa.Effects;
 
 namespace OpenRa.Traits
 {
-	class RenderBuildingInfo : RenderSimpleInfo
+	public class RenderBuildingInfo : RenderSimpleInfo
 	{
 		public override object Create(Actor self) { return new RenderBuilding(self); }
 	}
 
-	class RenderBuilding : RenderSimple, INotifyDamage, INotifySold
+	public class RenderBuilding : RenderSimple, INotifyDamage, INotifySold
 	{
 		const int SmallBibStart = 1;
 		const int LargeBibStart = 5;
diff --git a/OpenRa.Game/Traits/Selectable.cs b/OpenRa.Game/Traits/Selectable.cs
index 494688975b..66a63a4ee8 100755
--- a/OpenRa.Game/Traits/Selectable.cs
+++ b/OpenRa.Game/Traits/Selectable.cs
@@ -5,12 +5,12 @@ using System.Text;
 
 namespace OpenRa.Traits
 {
-	class SelectableInfo : StatelessTraitInfo<Selectable>
+	public class SelectableInfo : StatelessTraitInfo<Selectable>
 	{
 		public readonly int Priority = 10;
 		public readonly int[] Bounds = null;
 		public readonly string Voice = "GenericVoice";
 	}
 
-	class Selectable {}
+	public class Selectable {}
 }
diff --git a/OpenRa.Game/WorldUtils.cs b/OpenRa.Game/WorldUtils.cs
index f66bc8469b..83f126fad1 100755
--- a/OpenRa.Game/WorldUtils.cs
+++ b/OpenRa.Game/WorldUtils.cs
@@ -52,6 +52,12 @@ namespace OpenRa
 					world.TileSet.GetWalkability(world.Map.MapTiles[a.X, a.Y])) < double.PositiveInfinity;
 		}
 
+		public static IEnumerable<Actor> FindUnitsAtMouse(this World world, int2 mouseLocation)
+		{
+			var loc = mouseLocation + Game.viewport.Location;
+			return FindUnits(world, loc, loc);
+		}
+
 		public static IEnumerable<Actor> FindUnits(this World world, float2 a, float2 b)
 		{
 			var min = float2.Min(a, b);
diff --git a/OpenRa.Game/Effects/InvulnEffect.cs b/OpenRa.Mods.RA/Effects/InvulnEffect.cs
old mode 100755
new mode 100644
similarity index 85%
rename from OpenRa.Game/Effects/InvulnEffect.cs
rename to OpenRa.Mods.RA/Effects/InvulnEffect.cs
index e17dfd8382..b6a546adc3
--- a/OpenRa.Game/Effects/InvulnEffect.cs
+++ b/OpenRa.Mods.RA/Effects/InvulnEffect.cs
@@ -1,8 +1,9 @@
 using System.Collections.Generic;
 using OpenRa.Graphics;
 using OpenRa.Traits;
+using OpenRa.Effects;
 
-namespace OpenRa.Effects
+namespace OpenRa.Mods.RA.Effects
 {
 	class InvulnEffect : IEffect
 	{
diff --git a/OpenRa.Game/Traits/IronCurtainPower.cs b/OpenRa.Mods.RA/IronCurtainPower.cs
similarity index 87%
rename from OpenRa.Game/Traits/IronCurtainPower.cs
rename to OpenRa.Mods.RA/IronCurtainPower.cs
index d0a727f415..3548e25aa1 100644
--- a/OpenRa.Game/Traits/IronCurtainPower.cs
+++ b/OpenRa.Mods.RA/IronCurtainPower.cs
@@ -1,10 +1,8 @@
-using System;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using OpenRa.Orders;
+using OpenRa.Traits;
 
-namespace OpenRa.Traits
+namespace OpenRa.Mods.RA
 {
 	class IronCurtainPowerInfo : SupportPowerInfo
 	{
@@ -61,9 +59,8 @@ namespace OpenRa.Traits
 			{
 				if (mi.Button == MouseButton.Left)
 				{
-					var loc = mi.Location + Game.viewport.Location;
-					var underCursor = world.FindUnits(loc, loc)
-						.Where(a => a.Owner == world.LocalPlayer
+					var underCursor = world.FindUnitsAtMouse(mi.Location)
+						.Where(a => a.Owner != null
 							&& a.traits.Contains<IronCurtainable>()
 							&& a.traits.Contains<Selectable>()).FirstOrDefault();
 
diff --git a/OpenRa.Game/Traits/IronCurtainable.cs b/OpenRa.Mods.RA/IronCurtainable.cs
similarity index 84%
rename from OpenRa.Game/Traits/IronCurtainable.cs
rename to OpenRa.Mods.RA/IronCurtainable.cs
index 3447cb0efb..b60a0f890c 100644
--- a/OpenRa.Game/Traits/IronCurtainable.cs
+++ b/OpenRa.Mods.RA/IronCurtainable.cs
@@ -1,7 +1,9 @@
 using System.Linq;
 using OpenRa.Effects;
+using OpenRa.Traits;
+using OpenRa.Mods.RA.Effects;
 
-namespace OpenRa.Traits
+namespace OpenRa.Mods.RA
 {
 	class IronCurtainableInfo : ITraitInfo
 	{
diff --git a/OpenRa.Mods.RA/OpenRa.Mods.RA.csproj b/OpenRa.Mods.RA/OpenRa.Mods.RA.csproj
index 188136c025..bff7beb4c1 100644
--- a/OpenRa.Mods.RA/OpenRa.Mods.RA.csproj
+++ b/OpenRa.Mods.RA/OpenRa.Mods.RA.csproj
@@ -53,9 +53,12 @@
     <Compile Include="Activities\Steal.cs" />
     <Compile Include="C4Demolition.cs" />
     <Compile Include="Effects\CrateEffect.cs" />
+    <Compile Include="Effects\InvulnEffect.cs" />
     <Compile Include="Effects\Parachute.cs" />
     <Compile Include="EngineerCapture.cs" />
     <Compile Include="InfiltrateForSonarPulse.cs" />
+    <Compile Include="IronCurtainable.cs" />
+    <Compile Include="IronCurtainPower.cs" />
     <Compile Include="ParaDrop.cs" />
     <Compile Include="ParatroopersPower.cs" />
     <Compile Include="RequiresPower.cs" />