My game keeps freezing

[BiscuitBoy1155]

I'm not trying to **** on the game, maybe I just got a bad disk, but it won't stop crashing. Everytime I'm in a shootout with more than 3 people, I can't save or it will crash, I can't leave or it will crash, and I can't complete a quest or mission with out it freezing and crashing. For example, I litterally can't complete the quest "Who goes there?" because it will freeze after all the enemies die. And I've already tried only killing MacRedd and taking his finger and then leaving, but the game either freezes before I can finish transitioning, or it transitions but loads forever. Once again I'm not trying to **** on the game, it's super fun, but this has prevented me from completing so many quests now that it has become a problem.