(GTA IV) is a good experience, mechanics are nice and a overall good story, (FARCRY 3) had a really bad story, really bad graphics and so glitchy, The last of us! enough said!
, (RED DEAD REDEMPTION) has a good story and a good open world, if you like the cow boy feel then you'll end up getting Red Dead redemption - Undead Nightmare, (FALLOUT 3) has the best story of them all, graphics are still up to date-ish and it is so open world that you will always have things to do. Even a year after completing the story.