diff --git a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
index 3c894a8de3..7f0ace144d 100644
--- a/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
+++ b/OpenRA.Mods.Common/OpenRA.Mods.Common.csproj
@@ -735,6 +735,7 @@
     <Compile Include="Traits\World\MapBuildRadius.cs" />
     <Compile Include="Traits\World\MapOptions.cs" />
     <Compile Include="Traits\World\MissionData.cs" />
+    <Compile Include="UtilityCommands\ExtractMapRules.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
diff --git a/OpenRA.Mods.Common/UtilityCommands/ExtractMapRules.cs b/OpenRA.Mods.Common/UtilityCommands/ExtractMapRules.cs
new file mode 100644
index 0000000000..0830f432aa
--- /dev/null
+++ b/OpenRA.Mods.Common/UtilityCommands/ExtractMapRules.cs
@@ -0,0 +1,67 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2016 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you 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. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using OpenRA.FileSystem;
+
+namespace OpenRA.Mods.Common.UtilityCommands
+{
+	public class ExtractMapRules : IUtilityCommand
+	{
+		string IUtilityCommand.Name { get { return "--map-rules"; } }
+		bool IUtilityCommand.ValidateArguments(string[] args) { return args.Length == 2; }
+
+		void MergeAndPrint(Map map, string key, MiniYaml value)
+		{
+			var nodes = new List<MiniYamlNode>();
+			var includes = new List<string>();
+			if (value != null && value.Value != null)
+			{
+				// The order of the included files matter, so we can defer to system files
+				// only as long as they are included first.
+				var include = false;
+				var files = FieldLoader.GetValue<string[]>("value", value.Value);
+				foreach (var f in files)
+				{
+					include |= map.Package.Contains(f);
+					if (include)
+						nodes.AddRange(MiniYaml.FromStream(map.Open(f)));
+					else
+						includes.Add(f);
+				}
+			}
+
+			if (value != null)
+				nodes.AddRange(value.Nodes);
+
+			var output = new MiniYaml(includes.JoinWith(", "), nodes);
+			Console.WriteLine(output.ToLines(key).JoinWith("\n"));
+		}
+
+		[Desc("MAPFILE", "Merge custom map rules into a form suitable for including in map.yaml.")]
+		void IUtilityCommand.Run(ModData modData, string[] args)
+		{
+			Game.ModData = modData;
+
+			var map = new Map(modData, modData.ModFiles.OpenPackage(args[1]));
+			MergeAndPrint(map, "Rules", map.RuleDefinitions);
+			MergeAndPrint(map, "Sequences", map.SequenceDefinitions);
+			MergeAndPrint(map, "VoxelSequences", map.VoxelSequenceDefinitions);
+			MergeAndPrint(map, "Weapons", map.WeaponDefinitions);
+			MergeAndPrint(map, "Voices", map.VoiceDefinitions);
+			MergeAndPrint(map, "Music", map.MusicDefinitions);
+			MergeAndPrint(map, "Notifications", map.NotificationDefinitions);
+		}
+	}
+}