Retail Games
Gears of War, Guitar Hero II, Crackdown, Dead Rising, Need for Speed: Most Wanted, The Elder Scrolls IV: Oblivion, Rockstar's Table Tennis.

Arcade Games
Hexic HD, Joust, Ultimate Mortal Kombat 3, Geometry Wars Evolved, Heavy Weapon, Uno, Doom, Alien Hominid HD, Frogger, Contra, Castlevania: Sympony of the Night, TMNT 1989 Arcade.

 That comes out to a grand total of twenty games. Try not to think I'm too crazy for the arcade games, I got a lot of them free.