I bought god of war 2 for the ps2(used), it didn't work, so I exchanged it for a new, squeaky clean one... still doesn't work. My other games, like GTA San Andreas and Scarface work on the system, so I don't know what the problem is. (Not to brag, but just to show you how bad my luck is) I tried it out on my PS3(80gb) and it turns out that I have one of the 80gigs that isn't backwards compatible. What do you think the problem is, please help!