As it stands now, there's lots:
-Metal Gear Solid 4
-BioShock
-Lost Odyssey
-Tales of Vesperia
-Gears of War 1/2
-Call of Duty 4
-Ninja Gaiden 2
-Devil May Cry 4
-God of War 3
And more. Of course I can play some of those at friends, but that's very different from owning the game.
I drink your milkshake.