I would have to say Gears of War. It has amazing graphics, sound etc. and a lot of violence(which I love). Be aware though that this game is rated M for mature so it does have a lot of profanity in it. Semmingly since you don't care about the ratings it shouldn't matter. But hey don't get me wrong it's one of the best games that I have played for the 360 so far. Another great game is Rainbow Six.