You Must Construct Additional... (YMCA), an open source Command & Conquer game (based on the Combined Arms OpenRA mod), with a focus on large battles, is available on ModDB (in early access)

You Must Construct Additional.. mod for OpenRA

Real-Time Strategy built with OpenRA. Command & Conquer universe - inspired by Supreme Commander, Rusted Warfare, Generals and Tug of War games (like Direct Strike in Starcraft II).