Oof.. Well, I have 35 games in my Steam library but I'm sure I have even more games for DS, 3DS, Wii, original Xbox and even Gameboy! I have plenty of old game discs for PC on my shelf, ranging from Harry Potter to Spore to Robot Wars to both Zoo Tycoons with all expansion packs!
Not to mention games which I downloaded to my 3DS, which is about 30 in itself (I have the Ambassador download games too).
Yep, definitely over 100.
I only have a couple dozen games, almost all of them for my Xbox 360 (though I do have Spore on the PC. Too bad I can't play it. :/ ). Why bother with hundreds of games if you know you're only going to play about 20 of them on a regular basis?
(Well, 26 in my case, but that's beside the point!)