Sorry for the brevity of this post, I'm still perpetually tired, we just kicked up the number of hours at the office. In any case, here was my team's entry for Global Game Jam 2013, a game called Deadbeat done in Unreal. Its a 4 player co-op game with some issues but we had an almost-complete game, so thats something.

http://globalgamejam.org/sites/default/files/2013//download/UDKInstall-Deadbeat.zip