Help choosing PS3 Games?

I Think that ratchet and clank is one of the games that will be offered for free to users before the hack if that changes your decision personally my choice would be uncharted and the god of war collection but seeing as you like story line and multiplayer I would say uncharted for story and killzone 2 for multiplayer i would perhaps consider the battlefield or cod series for multiplayer because i'm not a fan of killzone