-Medal of Honor: Airborne.
-LOTRO (MMO).
-Eve Online (MMO).
-Resident Evil 5.
-Far Cry 2.
-Call of Duty 4 Modern Warfare & World at War.
-Half Life 2 (Get the Orange Box edition, comes with Team Fortress and Portal).
-Grid (Has nice graphics, gameplays satisfactory).
-Fallout 3 (If it's your cup of tea).
-Jade Empire.
-KOTOR 1 & 2.
-Company of Heroes.
-X3: Terrain Conflict.
-Unreal Tournament 3 (Uses the same engine as Gears of War).
-Call of Juarez (Under-rated game).
-Fable.
And possibly many more titles out atm i haven't taken an eye to. There's also Crysis 2, Mass Effect 2, and Far Cry 3 (in development) down the line, with Crysis 2 i think was set for November (but might of been changed) and Mass Effect 2 for the end of February.