Kantor on 24 June 2011
Of the ones that I actually feel the desire to finish (there are many more) or play substantially:
Team Fortress 2
Left 4 Dead 2
Dragon Age: Origins
LittleBigPlanet 2
Far Cry
So, that's five. As I said, considerably more if you count the games that I've barely touched and have no desire to ever play again, like Crysis and Company of Heroes.
(Former) Lead Moderator and (Eternal) VGC Detective 
