I know the PS3 is backward compatible with PS2 games. The game I wanted to get was God of War 2 because it looks pretty cool and the PS3 lineup is fairly slim at the moment. I see that Sony makes a memory card adaptor for the PS3. I never have played this game on a PS2. Will I need the memory card adaptor at all or will it just save the game to my HDD? Also is the PS3 compatible with all games specifically God of War 2? Thanks in advance or any help.