Excessive Unreal 2 is one of the most chaotic, stupid, hilarious, and insane mods ever made for Unreal Tournament, and it has incredibly well-balanced, action-packed gameplay. If you like Serious Sam, Doom, and Unreal - especially when blended together in the most absurd (yet somehow perfect) way - this mod is for you.
Latest version as of January 15, 2013. This will bring a v5.01 install up to v5.02. If you downloaded v5.00 but not v5.01, get v5.01 first, THEN install v5.02! v5.01 downloads are still available on the EXU2 Forums, but as most people will either patch or start fresh, I'll save some clutter here and not put it on ModDB.