diff --git a/OpenRA.Mods.D2k/AutoCarryall/CarryUnit.cs b/OpenRA.Mods.D2k/Activities/CarryUnit.cs
similarity index 98%
rename from OpenRA.Mods.D2k/AutoCarryall/CarryUnit.cs
rename to OpenRA.Mods.D2k/Activities/CarryUnit.cs
index f01193aa85..0cc099616b 100644
--- a/OpenRA.Mods.D2k/AutoCarryall/CarryUnit.cs
+++ b/OpenRA.Mods.D2k/Activities/CarryUnit.cs
@@ -11,12 +11,13 @@ using System;
 using System.Drawing;
 using System.Linq;
 using OpenRA.Activities;
+using OpenRA.Mods.D2k.Traits;
 using OpenRA.Mods.RA;
 using OpenRA.Mods.RA.Activities;
 using OpenRA.Mods.RA.Traits;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Activities
 {
 	public class CarryUnit : Activity
 	{
diff --git a/OpenRA.Mods.D2k/SwallowActor.cs b/OpenRA.Mods.D2k/Activities/SwallowActor.cs
similarity index 98%
rename from OpenRA.Mods.D2k/SwallowActor.cs
rename to OpenRA.Mods.D2k/Activities/SwallowActor.cs
index 5d6d8c05cd..e9491a27bd 100644
--- a/OpenRA.Mods.D2k/SwallowActor.cs
+++ b/OpenRA.Mods.D2k/Activities/SwallowActor.cs
@@ -14,10 +14,11 @@ using OpenRA.Activities;
 using OpenRA.GameRules;
 using OpenRA.Mods.Common;
 using OpenRA.Mods.Common.Traits;
+using OpenRA.Mods.D2k.Traits;
 using OpenRA.Mods.RA.Move;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Activities
 {
 	enum AttackState { Burrowed, EmergingAboveGround, ReturningUnderground }
 
diff --git a/OpenRA.Mods.D2k/OpenRA.Mods.D2k.csproj b/OpenRA.Mods.D2k/OpenRA.Mods.D2k.csproj
index 8889a12c7d..714ab3766e 100644
--- a/OpenRA.Mods.D2k/OpenRA.Mods.D2k.csproj
+++ b/OpenRA.Mods.D2k/OpenRA.Mods.D2k.csproj
@@ -68,32 +68,32 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
-    <Compile Include="AttackSwallow.cs" />
-    <Compile Include="SwallowActor.cs" />
+    <Compile Include="Activities\CarryUnit.cs" />
+    <Compile Include="Activities\SwallowActor.cs" />
     <Compile Include="SpriteLoaders\R8Loader.cs" />
+    <Compile Include="Traits\AttackSwallow.cs" />
+    <Compile Include="Traits\AutoCarryall.cs" />
     <Compile Include="Traits\Buildings\DamagedWithoutFoundation.cs" />
+    <Compile Include="Traits\Carryable.cs" />
     <Compile Include="Traits\Render\WithBuildingPlacedOverlay.cs" />
     <Compile Include="Traits\Render\WithCrumbleOverlay.cs" />
-    <Compile Include="Traits\Render\WithProductionOverlay.cs" />
     <Compile Include="Traits\Render\WithDockingOverlay.cs" />
     <Compile Include="Traits\Render\WithDeliveryOverlay.cs" />
+    <Compile Include="Traits\Render\WithProductionOverlay.cs" />
+    <Compile Include="Traits\TemporaryOwnerManager.cs" />
     <Compile Include="Traits\ThrowsShrapnel.cs" />
     <Compile Include="Traits\World\ChooseBuildTabOnSelect.cs" />
-    <Compile Include="Traits\World\PaletteFromR8.cs" />
-    <Compile Include="Traits\World\FogPaletteFromR8.cs" />
     <Compile Include="Traits\World\D2kResourceLayer.cs" />
+    <Compile Include="Traits\World\FogPaletteFromR8.cs" />
+    <Compile Include="Traits\World\PaletteFromR8.cs" />
     <Compile Include="Traits\World\PaletteFromScaledPalette.cs" />
+    <Compile Include="Traits\World\WormManager.cs" />
+    <Compile Include="Warheads\ChangeOwnerWarhead.cs" />
+    <Compile Include="Widgets\BuildPaletteWidget.cs" />
+    <Compile Include="Widgets\Logic\IngameChromeLogic.cs" />
     <Compile Include="Widgets\MoneyBinWidget.cs" />
     <Compile Include="Widgets\SupportPowerBinWidget.cs" />
-    <Compile Include="Widgets\BuildPaletteWidget.cs" />
     <Compile Include="Widgets\SlidingContainerWidget.cs" />
-    <Compile Include="Widgets\Logic\IngameChromeLogic.cs" />
-    <Compile Include="AutoCarryall\AutoCarryall.cs" />
-    <Compile Include="AutoCarryall\Carryable.cs" />
-    <Compile Include="AutoCarryall\CarryUnit.cs" />
-    <Compile Include="WormManager.cs" />
-    <Compile Include="ChangeOwnerWarhead.cs" />
-    <Compile Include="TemporaryOwnerManager.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
diff --git a/OpenRA.Mods.D2k/AttackSwallow.cs b/OpenRA.Mods.D2k/Traits/AttackSwallow.cs
similarity index 95%
rename from OpenRA.Mods.D2k/AttackSwallow.cs
rename to OpenRA.Mods.D2k/Traits/AttackSwallow.cs
index 0732f0fa9a..3293cae7d5 100644
--- a/OpenRA.Mods.D2k/AttackSwallow.cs
+++ b/OpenRA.Mods.D2k/Traits/AttackSwallow.cs
@@ -8,10 +8,11 @@
  */
 #endregion
 
+using OpenRA.Mods.D2k.Activities;
 using OpenRA.Mods.RA;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Sandworms use this attack model.")]
 	class AttackSwallowInfo : AttackFrontalInfo
diff --git a/OpenRA.Mods.D2k/AutoCarryall/AutoCarryall.cs b/OpenRA.Mods.D2k/Traits/AutoCarryall.cs
similarity index 98%
rename from OpenRA.Mods.D2k/AutoCarryall/AutoCarryall.cs
rename to OpenRA.Mods.D2k/Traits/AutoCarryall.cs
index 6d47e5d8b4..42c931daa6 100644
--- a/OpenRA.Mods.D2k/AutoCarryall/AutoCarryall.cs
+++ b/OpenRA.Mods.D2k/Traits/AutoCarryall.cs
@@ -12,12 +12,13 @@ using System.Collections.Generic;
 using System.Linq;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Traits;
+using OpenRA.Mods.D2k.Activities;
 using OpenRA.Mods.RA;
 using OpenRA.Mods.RA.Activities;
 using OpenRA.Mods.RA.Traits;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Automatically transports harvesters with the Carryable trait between resource fields and refineries")]
 	public class AutoCarryallInfo : ITraitInfo, Requires<IBodyOrientationInfo>
diff --git a/OpenRA.Mods.D2k/AutoCarryall/Carryable.cs b/OpenRA.Mods.D2k/Traits/Carryable.cs
similarity index 98%
rename from OpenRA.Mods.D2k/AutoCarryall/Carryable.cs
rename to OpenRA.Mods.D2k/Traits/Carryable.cs
index 46ed0cb9bf..85c555f853 100644
--- a/OpenRA.Mods.D2k/AutoCarryall/Carryable.cs
+++ b/OpenRA.Mods.D2k/Traits/Carryable.cs
@@ -12,9 +12,10 @@ using System.Linq;
 using OpenRA.Activities;
 using OpenRA.Mods.Common;
 using OpenRA.Mods.Common.Traits;
+using OpenRA.Mods.D2k.Activities;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Can be carried by units with the trait `AutoCarryall`.")]
 	public class CarryableInfo : ITraitInfo
diff --git a/OpenRA.Mods.D2k/TemporaryOwnerManager.cs b/OpenRA.Mods.D2k/Traits/TemporaryOwnerManager.cs
similarity index 98%
rename from OpenRA.Mods.D2k/TemporaryOwnerManager.cs
rename to OpenRA.Mods.D2k/Traits/TemporaryOwnerManager.cs
index 725f21ca73..91475bc633 100644
--- a/OpenRA.Mods.D2k/TemporaryOwnerManager.cs
+++ b/OpenRA.Mods.D2k/Traits/TemporaryOwnerManager.cs
@@ -11,7 +11,7 @@
 using System.Drawing;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Interacts with the ChangeOwner warhead.",
 		"Displays a bar how long this actor is affected and reverts back to the old owner on temporary changes.")]
diff --git a/OpenRA.Mods.D2k/WormManager.cs b/OpenRA.Mods.D2k/Traits/World/WormManager.cs
similarity index 99%
rename from OpenRA.Mods.D2k/WormManager.cs
rename to OpenRA.Mods.D2k/Traits/World/WormManager.cs
index deb74aca5c..40ba93871c 100644
--- a/OpenRA.Mods.D2k/WormManager.cs
+++ b/OpenRA.Mods.D2k/Traits/World/WormManager.cs
@@ -16,7 +16,7 @@ using OpenRA.Mods.Common.Traits;
 using OpenRA.Primitives;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Traits
 {
 	[Desc("Controls the spawning of sandworms. Attach this to the world actor.")]
 	class WormManagerInfo : ITraitInfo
diff --git a/OpenRA.Mods.D2k/ChangeOwnerWarhead.cs b/OpenRA.Mods.D2k/Warheads/ChangeOwnerWarhead.cs
similarity index 95%
rename from OpenRA.Mods.D2k/ChangeOwnerWarhead.cs
rename to OpenRA.Mods.D2k/Warheads/ChangeOwnerWarhead.cs
index b17fea5f5c..3be8ed3fef 100644
--- a/OpenRA.Mods.D2k/ChangeOwnerWarhead.cs
+++ b/OpenRA.Mods.D2k/Warheads/ChangeOwnerWarhead.cs
@@ -10,9 +10,10 @@
 
 using System.Collections.Generic;
 using OpenRA.GameRules;
+using OpenRA.Mods.D2k.Traits;
 using OpenRA.Traits;
 
-namespace OpenRA.Mods.D2k
+namespace OpenRA.Mods.D2k.Warheads
 {
 	[Desc("Interacts with the DynamicOwnerChange trait.")]
 	public class ChangeOwnerWarhead : Warhead