played my copy of red faction:a (ps3) and it locked up on the final chapter, system freeze each time.
Disc didn't look bad, and there hadn't been any problems prior. Returning, probably not going to rebuy.
I think I'm more disappointed about how great the game could have been. The new weapons, experience system, vehicles and rebuild gun + rf:g would have been so much better.
Same thing happened to me with LA Noire. Turns out my Blu ray drive was going out. Just giving you a heads up in case it happens to other games.