Here's my Steam game library, with the amount of time I've played each game. Most haven't been played.
http://steamcommunity.com/id/rubang/games?tab=all
And I have about 300 NES cartridges. Still haven't played half of them.
So that right there's about 250, only including PC and NES. And yes, I own BioShock, Braid, GTA 4, Civ 4, Knights of the Old Republic, The Witcher, and Left 4 Dead 2, and haven't even started any of them.