diff --git a/OpenRA.Mods.Common/FileSystem/DefaultFileSystemLoader.cs b/OpenRA.Mods.Common/FileSystem/DefaultFileSystemLoader.cs
index d428846733..8cd69d1cd6 100644
--- a/OpenRA.Mods.Common/FileSystem/DefaultFileSystemLoader.cs
+++ b/OpenRA.Mods.Common/FileSystem/DefaultFileSystemLoader.cs
@@ -10,10 +10,19 @@
 #endregion
 
 using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.FileSystem
 {
-	public class DefaultFileSystemLoader : IFileSystemLoader
+	[RequireExplicitImplementation]
+	public interface IFileSystemExternalContent
+	{
+		public bool InstallContentIfRequired(ModData modData);
+	}
+
+	public class DefaultFileSystemLoader : IFileSystemLoader, IFileSystemExternalContent
 	{
 		public readonly Dictionary<string, string> Packages = null;
 
@@ -23,5 +32,24 @@ namespace OpenRA.Mods.Common.FileSystem
 				foreach (var kv in Packages)
 					fileSystem.Mount(kv.Key, kv.Value);
 		}
+
+		bool IFileSystemExternalContent.InstallContentIfRequired(ModData modData)
+		{
+			// If a ModContent section is defined then we need to make sure that the
+			// required content is installed or switch to the defined content installer.
+			if (!modData.Manifest.Contains<ModContent>())
+				return false;
+
+			var content = modData.Manifest.Get<ModContent>();
+			var contentInstalled = content.Packages
+				.Where(p => p.Value.Required)
+				.All(p => p.Value.TestFiles.All(f => File.Exists(Platform.ResolvePath(f))));
+
+			if (contentInstalled)
+				return false;
+
+			Game.InitializeMod(content.ContentInstallerMod, new Arguments("Content.Mod=" + modData.Manifest.Id));
+			return true;
+		}
 	}
 }
diff --git a/OpenRA.Mods.Common/LoadScreens/BlankLoadScreen.cs b/OpenRA.Mods.Common/LoadScreens/BlankLoadScreen.cs
index 9727bdba28..b76a7dc842 100644
--- a/OpenRA.Mods.Common/LoadScreens/BlankLoadScreen.cs
+++ b/OpenRA.Mods.Common/LoadScreens/BlankLoadScreen.cs
@@ -12,8 +12,8 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using OpenRA.FileFormats;
+using OpenRA.Mods.Common.FileSystem;
 using OpenRA.Mods.Common.Widgets.Logic;
 using OpenRA.Widgets;
 
@@ -126,21 +126,10 @@ namespace OpenRA.Mods.Common.LoadScreens
 			if (graphicSettings.GLProfile != GLProfile.Automatic && graphicSettings.GLProfile != Game.Renderer.GLProfile)
 				graphicSettings.GLProfile = GLProfile.Automatic;
 
-			// If a ModContent section is defined then we need to make sure that the
-			// required content is installed or switch to the defined content installer.
-			if (!ModData.Manifest.Contains<ModContent>())
+			if (ModData.FileSystemLoader is not IFileSystemExternalContent content)
 				return true;
 
-			var content = ModData.Manifest.Get<ModContent>();
-			var contentInstalled = content.Packages
-				.Where(p => p.Value.Required)
-				.All(p => p.Value.TestFiles.All(f => File.Exists(Platform.ResolvePath(f))));
-
-			if (contentInstalled)
-				return true;
-
-			Game.InitializeMod(content.ContentInstallerMod, new Arguments(new[] { "Content.Mod=" + ModData.Manifest.Id }));
-			return false;
+			return !content.InstallContentIfRequired(ModData);
 		}
 	}
 }