Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Mods.Common/PlayerExtensions.cs

@@ -0,0 +1,26 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * 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.Linq;
+using OpenRA.Mods.Common.Traits;
+
+namespace OpenRA.Mods.Common
+{
+	public static class PlayerExtensions
+	{
+		public static bool HasNoRequiredUnits(this Player player, bool shortGame)
+		{
+			if (shortGame)
+				return !player.World.ActorsHavingTrait<MustBeDestroyed>(t => t.Info.RequiredForShortGame).Any(a => a.Owner == player);
+			return !player.World.ActorsHavingTrait<MustBeDestroyed>().Any(a => a.Owner == player && a.IsInWorld);
+		}
+	}
+}