A total conversion for Unreal Tournament, by Waffnuffly.
Excessive Unreal 2: Batshit Insane is a large singleplayer campaign for Unreal Tournament with full coop support. It is set in Hell on Na Pali, and is completely over-the-top with absurdly powerful weapons and giant hordes of a huge variety of enemies. It’s Unreal like you’ve never seen it before. (UnrealSP.org)