Can anyone recommend any good XBOX 360 splitscreen co op games besides GRAW and GoW?

I know LIVE is a great way to play with other people, but I just want to sit down with some buddies on Saturday and play a few hours of a good co op game. Problem is, we've finished GoW and GRAW and rocked every last bit of fun out of Guitar Hero II (for now). So what else is there to get?