Uh I have a lot, because I live with my partner and he literally collects games and since its our stuff and not his well.
I can say that atm I have a Ps1, Ps2, Ps3, Ps4, Psvita, Psp, Nintendo 3DS XL, 1 Nintendo 2DS(mine), Xbox 360, PC.
PS1- +10 games
PS2- Loads of pirated ones and +5 originals, his brothers broke most of them, he had more than 20;
PS3- I can say that is more than 70 games
PS4- Knack, MGS Ground Zeros, Battlefield 4,Watch Dogs, all the free games from PS Plus, Injustice. Doki doki Universe.
PSVita- It might be the one with the smallest collection.
3DS/2DS- Most of Pokemon games, 2 New Leafs, some old DS games and Harvest Moon: A new Beggining...
PSP- Mostly MGS and emulators now.
Xbox- +20games
PC- Steam/Origin/Desura- I might have over 400 in my library all together, my partner over 600 o.o. Lucky we have family sharing now, I don't need to buy anything apart from Co-Op games.
Can't honestly remember all the games since I can't see my library here, but I would never write all of them. Too much work.
We mostly have all Fable Games(apart from Journey), all MGS collection, Mass Effect, Dragon Age.