I played Dead Rising. Unfortunately, that was before we got an HD tv, and I could barely make out the text at the bottom, so I never finished it. I did get pretty far though.
Now that we have a much better tv, our 360 died.. Maybe I'll get to actually finish it one day.
Anyway, it's an awesome game. The best part is that the entire mall is interactive - you can pick up just about anything to use as a weapon. Even soccer balls are useful for knocking down zombies.