Do other games play okay? If not, try putting in a dvd and playing it. If the dvd works but not the games, I would guess to say that your blu laser might be shot. If it is and you are not under warranty, the laser is simple enough to replace. I just replaced mine 2 days ago because it would not read games or blu ray dvds anymore. Sorry to hear about your troubles.
Can I replce the laser myself or do I have to send it in? It freezes whenever I try to play a game or watch a blu-ray movie, but not when I put in a regular DVD so I guess I have the same problem as you.