I don't wanna count, I think around 60-80? I have around 22 games on 360 and ps3, probably around 40 for ps2, gamecube, xbox combined. Then I have all the gameboy, snes games. Also I probably have 20+ on steam, I remember those indie packs comes with like 5 games for like 3 bucks, so I got a few of them.
I've been spending less and less over the years though, I always just buy games at a discounted price, or I just don't care and just play a demo and call it a day. Thank god for demos, games nowadays just takes what you see in that demo and copy and paste it 20 times anyway with no progression, I just play the demo 20 times and save myself 60bucks.