diff --git a/OpenRA.Game/OpenRA.Game.csproj b/OpenRA.Game/OpenRA.Game.csproj
index aea360ca68..810cd2d88d 100644
--- a/OpenRA.Game/OpenRA.Game.csproj
+++ b/OpenRA.Game/OpenRA.Game.csproj
@@ -255,9 +255,6 @@
     <Compile Include="Primitives\ObservableList.cs" />
     <Compile Include="Graphics\RgbaColorRenderer.cs" />
     <Compile Include="Traits\Player\IndexedPlayerPalette.cs" />
-    <Compile Include="FileFormats\LCWCompression.cs" />
-    <Compile Include="FileFormats\XORDeltaCompression.cs" />
-    <Compile Include="FileFormats\RLEZerosCompression.cs" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="FileSystem\D2kSoundResources.cs" />
diff --git a/OpenRA.Game/FileFormats/LCWCompression.cs b/OpenRA.Mods.Common/FileFormats/LCWCompression.cs
similarity index 99%
rename from OpenRA.Game/FileFormats/LCWCompression.cs
rename to OpenRA.Mods.Common/FileFormats/LCWCompression.cs
index 36b8542f79..4f7517d817 100644
--- a/OpenRA.Game/FileFormats/LCWCompression.cs
+++ b/OpenRA.Mods.Common/FileFormats/LCWCompression.cs
@@ -11,7 +11,7 @@
 using System;
 using System.IO;
 
-namespace OpenRA.FileFormats
+namespace OpenRA.Mods.Common.FileFormats
 {
 	class FastByteReader
 	{
diff --git a/OpenRA.Game/FileFormats/RLEZerosCompression.cs b/OpenRA.Mods.Common/FileFormats/RLEZerosCompression.cs
similarity index 95%
rename from OpenRA.Game/FileFormats/RLEZerosCompression.cs
rename to OpenRA.Mods.Common/FileFormats/RLEZerosCompression.cs
index cd135a4df6..40c67762da 100644
--- a/OpenRA.Game/FileFormats/RLEZerosCompression.cs
+++ b/OpenRA.Mods.Common/FileFormats/RLEZerosCompression.cs
@@ -8,7 +8,7 @@
  */
 #endregion
 
-namespace OpenRA.FileFormats
+namespace OpenRA.Mods.Common.FileFormats
 {
 	// Run length encoded sequences of zeros (aka Format2)
 	public static class RLEZerosCompression
diff --git a/OpenRA.Game/FileFormats/XORDeltaCompression.cs b/OpenRA.Mods.Common/FileFormats/XORDeltaCompression.cs
similarity index 97%
rename from OpenRA.Game/FileFormats/XORDeltaCompression.cs
rename to OpenRA.Mods.Common/FileFormats/XORDeltaCompression.cs
index a76c78026b..995bcfc2ef 100644
--- a/OpenRA.Game/FileFormats/XORDeltaCompression.cs
+++ b/OpenRA.Mods.Common/FileFormats/XORDeltaCompression.cs
@@ -8,7 +8,7 @@
  */
 #endregion
 
-namespace OpenRA.FileFormats
+namespace OpenRA.Mods.Common.FileFormats
 {
 	// Data that is to be XORed against another set of data (aka Format40)
 	public static class XORDeltaCompression
diff --git a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
index d0cca4071d..5512e774ef 100644
--- a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
+++ b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
@@ -720,6 +720,9 @@
     <Compile Include="Graphics\DetectionCircleRenderable.cs" />
     <Compile Include="Traits\Render\WithIdleAnimation.cs" />
     <Compile Include="FileFormats\VqaReader.cs" />
+    <Compile Include="FileFormats\LCWCompression.cs" />
+    <Compile Include="FileFormats\XORDeltaCompression.cs" />
+    <Compile Include="FileFormats\RLEZerosCompression.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
diff --git a/OpenRA.Mods.Common/SpriteLoaders/ShpD2Loader.cs b/OpenRA.Mods.Common/SpriteLoaders/ShpD2Loader.cs
index 4415dd35f8..01732868b4 100644
--- a/OpenRA.Mods.Common/SpriteLoaders/ShpD2Loader.cs
+++ b/OpenRA.Mods.Common/SpriteLoaders/ShpD2Loader.cs
@@ -11,8 +11,8 @@
 using System;
 using System.Drawing;
 using System.IO;
-using OpenRA.FileFormats;
 using OpenRA.Graphics;
+using OpenRA.Mods.Common.FileFormats;
 
 namespace OpenRA.Mods.Common.SpriteLoaders
 {
diff --git a/OpenRA.Mods.Common/SpriteLoaders/ShpTDLoader.cs b/OpenRA.Mods.Common/SpriteLoaders/ShpTDLoader.cs
index 3e9a295323..34b0009e26 100644
--- a/OpenRA.Mods.Common/SpriteLoaders/ShpTDLoader.cs
+++ b/OpenRA.Mods.Common/SpriteLoaders/ShpTDLoader.cs
@@ -13,8 +13,8 @@ using System.Collections.Generic;
 using System.Drawing;
 using System.IO;
 using System.Linq;
-using OpenRA.FileFormats;
 using OpenRA.Graphics;
+using OpenRA.Mods.Common.FileFormats;
 
 namespace OpenRA.Mods.Common.SpriteLoaders
 {
diff --git a/OpenRA.Mods.Common/SpriteLoaders/ShpTSLoader.cs b/OpenRA.Mods.Common/SpriteLoaders/ShpTSLoader.cs
index eb893e43d6..3e8ba08711 100644
--- a/OpenRA.Mods.Common/SpriteLoaders/ShpTSLoader.cs
+++ b/OpenRA.Mods.Common/SpriteLoaders/ShpTSLoader.cs
@@ -10,8 +10,8 @@
 
 using System.Drawing;
 using System.IO;
-using OpenRA.FileFormats;
 using OpenRA.Graphics;
+using OpenRA.Mods.Common.FileFormats;
 
 namespace OpenRA.Mods.Common.SpriteLoaders
 {
diff --git a/OpenRA.Mods.Common/UtilityCommands/LegacyMapImporter.cs b/OpenRA.Mods.Common/UtilityCommands/LegacyMapImporter.cs
index c5bca83334..6b12e6dc59 100644
--- a/OpenRA.Mods.Common/UtilityCommands/LegacyMapImporter.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/LegacyMapImporter.cs
@@ -15,6 +15,7 @@ using System.Linq;
 using System.Text;
 using OpenRA.FileFormats;
 using OpenRA.Graphics;
+using OpenRA.Mods.Common.FileFormats;
 using OpenRA.Mods.Common.Traits;
 using OpenRA.Primitives;