Been playing the Assassin's Creed Brotherhood beta. Haven't finished, because it's for multiplayer.
It's awesome. Frustrating at times, but getting a massive-score kill is just so satisfying. Equally satisfying when you trick a guy trying to kill you into killing a civilian, or just surviving a chase. It's definitely one of those games where the little things make it so worthwhile.
As for a game I just finished, Dead Rising 2.
Some of the best AI I've seen recently, good weapons, good bosses despite co-op making them a little to easy. Mindless zombie-killing at it's best, with an ok story. Last boss is a joke. Co-op makes both easier and harder at the same time. You NEED a mic to do co-op, though. Favorite weapon: laser sword.