Within the last 2 weeks, I've had my Xbox freeze multiple times while trying to play online multiplayer on Black Ops 2. It hasn't happened when playing any other game or running apps. I usually get through a few matches and then after one the screen is black and I can't do anything. I can push the center button to shut down the console, but then it freezes before I can choose to do this. I've had the game for almost a year and I've never had problems with it before.