I've got about 20.
Alan Wake
Banjo Kazooie (rare replay)
Banjo Tooie (once again, rare replay)
Borderlands
Call of Duty®: Black Ops
Dead Space
Deus Ex: Human Revolution
Fallout 3
Fallout NV
Gears of War
Gears of War 2
Gears of War 3
Gears of War: Judgement (just saying, I got all of them via GFG).
Halo: Reach
Just Cause 2
Mass Effect (just hurry up with the trilogy!)
Perfect Dark (Rare Replay)
Perfect Dark Zero (Rare Replay)
Read Dead Redemption
Saints Row IV
The Witcher 2
XCOM: Enemy Unknown
So 22.
G
Made a bet with LipeJJ and HylianYoshi that the XB1 will reach 30 million before Wii U reaches 15 million. Loser has to get avatar picked by winner for 6 months (or if I lose, either 6 months avatar control for both Lipe and Hylian, or my patrick avatar comes back forever).
