I dont know i've lost count...
I'm a sucker for the cheap deals GAME and Gamestation do on preowned so I know I have atleast 20 PS2 game 10 PS3 games and over 20 360 games unplayed and still has the purcahuse seal on them.
there's also a stack of unopened DS, wii and gamecube games in a cupboard somewhere... I really need to stop impulse buying
I also has the maw and Shadow complex I got off XBLA that I haven't even run yet also with most of the games on this list
but when a game cost less than small pizza of course i'm gonna impulse buy it ^_^