FPS: Wolfenstein, Bioshock 2, Bad Company 2, Metro 2033, Call of Duty Modern Warfare 2, Call of Duty Black Ops, etc.
RPG: Mass Effect 1/2 (Play 1 first if you haven't already), Oblivion (If you haven't played this, you don't really know the essence of RPG's), Fallout 3, etc.
[Edited by HonestGamer, 1/24/2011 1:52:57 AM]
2.Max Payne 2 The Fall of Max Payne
3.Mass Effect and Mass Effect 2
5.BioShock and BioShock 2
6.Fallout 3(buy the game of the year edition it has all DLC's) and Fallout New Vegas
7.Dead Space and Dead Space 2
8.Company of Heroes series
9.StarCraft(Brood War expansion pack) and StarCraft II
10.Half Life series 11.Dawn of War II 12.Dawn of War II Chaos Rising 13.Battlefieald Bad Company 2(PS3,Xbox360,PC)(PS3,Xbox 360) 14.Darksider's Wrath of War
All are good games, they never get boring, there are, a lot more both I don't think that you are ready to give all your money just for video games.
[Edited by Devillord2009, 1/24/2011 9:29:41 AM] The last games based on the recomodation of:CHEATMASTER
[Edited by Devillord2009, 1/24/2011 9:30:30 AM]
Mass Effect 2
Lost Planet 2
Fallout New Vegas