Red Alert DEN
has a new Co-op mission for Red Alert 2, the first fan made one. It's done by the famous RVMECH and takes place in the hills of Appalachia over the course of a few days. Weighing it at only 11MB, I recommend all RA2 players give it a shot. Installer included. Note that both players must have the mission installed, as it will not transfer at game startup.