diff --git a/OpenRA.Game/OpenRA.Game.csproj b/OpenRA.Game/OpenRA.Game.csproj
index 3a894ecdb8..4cd3042b9a 100755
--- a/OpenRA.Game/OpenRA.Game.csproj
+++ b/OpenRA.Game/OpenRA.Game.csproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -240,6 +240,7 @@
     <Compile Include="GameRules\MusicInfo.cs" />
     <Compile Include="Widgets\PowerBinWidget.cs" />
     <Compile Include="Widgets\ImageWidget.cs" />
+    <Compile Include="Traits\SharesCell.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\OpenRA.FileFormats\OpenRA.FileFormats.csproj">
@@ -275,4 +276,7 @@
   <Target Name="AfterBuild">
   </Target>
   -->
+  <ItemGroup>
+    <Folder Include="Traits\" />
+  </ItemGroup>
 </Project>
\ No newline at end of file
diff --git a/OpenRA.Game/PathSearch.cs b/OpenRA.Game/PathSearch.cs
index 7efe42def8..4eead3e6ba 100755
--- a/OpenRA.Game/PathSearch.cs
+++ b/OpenRA.Game/PathSearch.cs
@@ -116,7 +116,7 @@ namespace OpenRA
 					continue;
 
 				var mobile = self.traits.Get<Mobile>();
-				if (checkForBlocked && !mobile.CanEnterCell(newHere))
+				if (checkForBlocked && !mobile.CanEnterCell(newHere, ignoreBuilding))
 					continue;
 				
 				if (customBlock != null && customBlock(newHere))
diff --git a/OpenRA.Game/Traits/Activities/Move.cs b/OpenRA.Game/Traits/Activities/Move.cs
index dccdbdb656..e3ec8bd41d 100755
--- a/OpenRA.Game/Traits/Activities/Move.cs
+++ b/OpenRA.Game/Traits/Activities/Move.cs
@@ -168,7 +168,7 @@ namespace OpenRA.Traits.Activities
 		{
 			if( path.Count == 0 ) return null;
 			var nextCell = path[ path.Count - 1 ];
-			if( !mobile.CanEnterCell( nextCell ) )
+			if( !mobile.CanEnterCell( nextCell, ignoreBuilding ) )
 			{
 				if( ( mobile.toCell - destination.Value ).LengthSquared <= nearEnough )
 				{
@@ -244,7 +244,6 @@ namespace OpenRA.Traits.Activities
 				var frac = (float)moveFraction / moveFractionTotal;
 
 				self.CenterLocation = float2.Lerp( from, to, frac );
-				//	+ self.traits.WithInterface<IOffsetCenterLocation>().Aggregate(float2.Zero, (a, x) => a + x.CenterOffset);
 
 				if( moveFraction >= moveFractionTotal )
 					unit.Facing = toFacing & 0xFF;
diff --git a/OpenRA.Game/Traits/Mobile.cs b/OpenRA.Game/Traits/Mobile.cs
index 54c75357a7..84d32f361d 100644
--- a/OpenRA.Game/Traits/Mobile.cs
+++ b/OpenRA.Game/Traits/Mobile.cs
@@ -121,12 +121,28 @@ namespace OpenRA.Traits
 		
 		public bool CanEnterCell(int2 p)
 		{
-			if (!self.World.WorldActor.traits.Get<BuildingInfluence>().CanMoveHere(p)) return false;
+			return CanEnterCell(p, null);
+		}
+		
+		public bool CanEnterCell(int2 p, Actor ignoreBuilding)
+		{
+			if (!self.World.WorldActor.traits.Get<BuildingInfluence>().CanMoveHere(p, ignoreBuilding)) return false;
 
-			if (self.World.WorldActor.traits.Get<UnitInfluence>().GetUnitsAt(p).Any(
-				a => a != self && !self.World.IsActorCrushableByActor(a, self)))
+			var canShare = self.traits.Contains<SharesCell>();
+			var actors = self.World.WorldActor.traits.Get<UnitInfluence>().GetUnitsAt(p);
+			var nonshareable = actors.Where(a => a != self && !(canShare && a.traits.Contains<SharesCell>()));
+			var shareable = actors.Where(a => a != self && canShare && a.traits.Contains<SharesCell>());
+			
+			// only allow 5 in a cell
+			if (shareable.Count() >= 5)
 				return false;
 			
+			// We can enter a cell with nonshareable units if we can crush all of them
+			if (nonshareable.Any(
+				a => !self.World.IsActorCrushableByActor(a, self)))
+				return false;
+			
+			
 			return self.World.Map.IsInMap(p.X, p.Y) &&
 				Rules.TerrainTypes[self.World.TileSet.GetTerrainType(self.World.Map.MapTiles[p.X, p.Y])]
 				.GetCost(GetMovementType()) < float.PositiveInfinity;
diff --git a/OpenRA.Game/Traits/SharesCell.cs b/OpenRA.Game/Traits/SharesCell.cs
new file mode 100644
index 0000000000..7cee42b254
--- /dev/null
+++ b/OpenRA.Game/Traits/SharesCell.cs
@@ -0,0 +1,46 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+namespace OpenRA.Traits
+{
+	class SharesCellInfo : TraitInfo<SharesCell> {}
+	public class SharesCell : IOffsetCenterLocation
+	{
+		[Sync]
+		public int Position;
+
+		public float2 CenterOffset
+		{ get {	
+			switch (Position)
+			{
+				case 1:
+					return new float2(-5f,-5f);
+				case 2:
+					return new float2(5f,-5f);
+				case 3:
+					return new float2(-5f,5f);
+				case 4:
+					return new float2(5f,5f);
+				default:
+					return new float2(-5f, -5f);
+			}
+		}}
+	}
+}
diff --git a/OpenRA.Game/Traits/TraitsInterfaces.cs b/OpenRA.Game/Traits/TraitsInterfaces.cs
index 5eb35fb76a..21a03e1c4a 100644
--- a/OpenRA.Game/Traits/TraitsInterfaces.cs
+++ b/OpenRA.Game/Traits/TraitsInterfaces.cs
@@ -103,6 +103,7 @@ namespace OpenRA.Traits
 		IEnumerable<float2> GetCurrentPath(Actor self);
 	}
 	
+	public interface IOffsetCenterLocation { float2 CenterOffset { get; } }
 	public interface ICrushable
 	{
 		void OnCrush(Actor crusher);
diff --git a/mods/cnc/defaults.yaml b/mods/cnc/defaults.yaml
index 0b167e693d..59bea365da 100644
--- a/mods/cnc/defaults.yaml
+++ b/mods/cnc/defaults.yaml
@@ -31,6 +31,7 @@
 	RevealsShroud:
 	GainsExperience:
 	GivesExperience:
+	SharesCell:
 
 ^Ship:
 	Category: Ship