Too many on Steam (It says 222, but I think this include the free 2 play titles as well):
http://steamcommunit...t/games?tab=all (Scroll down and choose "per page all")
Origin:
Battlefield 3
Battle.net:
Diabolo 3
World of Warcraft (Haven't played it for years)
No platform:
Blockscape
Minecraft
Final Fantasy XIV (This game sucks)
Guild Wars
Warcraft 3
Much more I can't remember now
Xbox 360:
Alone in the Dark
Resident Evil 5
Fallout 3
Blue Dragon
Star Ocean
Final Fantasy XI
I think 2 or 3 more but I am not sure
Wii:
A lot
This excludes pirated games, because this would make the list much much much much longer.