-Uncharted...though that took me 2 days to beat.
-Resistance 1...but you probably already have it.
-LittleBigPlanet...but I personally got bored of it after a month or so.
-Burnout Paradise.
-Midnight Club: LA....very good game imo, I'd recommend it.
-GTA4....(obviously, but you prob already have)
-And yeah Ratchet and Clank like you said, but yeah won't last long.
-Far Cry 2...might last you 2 months, depends how well you like it.
-Socom: Confrontation...good game despite the bad reviews.
-Rainbow 6 Vegas 2...maybe.
-Resistance 2 if you don't already have it.
-Oblivion can definitely last 2 months if you don't get bored.
But yeah just a few games that i think are great, I'm probably missing some. I find that games that are open world gameplay (GTA4, Far Cry 2) and have online too usually last the longest, hope I helped!
Halo 3 = Most overrated game in HISTORY.
