Here are the games that Microsoft have announced at E3 so far this year:
Tomb Raider DLC
Splinter Cell: Blacklist
Wreckateer
Dance Central 3
Call of Duty: Black Ops 2
Lococycle
Forza Horizon
Gears of War: Judgment
Fable: The Journey
Resident Evil 6
Acend: New Gods
Metal Gear Rising: Revengeance
Madden NFL
Fifa 13
I will edit this as more games are confirmed.
Feel free to comment and add more games.
Tomb Raider DLC
Splinter Cell: Blacklist
Wreckateer
Dance Central 3
Call of Duty: Black Ops 2
Lococycle
Forza Horizon
Gears of War: Judgment
Fable: The Journey
Resident Evil 6
Acend: New Gods
Metal Gear Rising: Revengeance
Madden NFL
Fifa 13
I will edit this as more games are confirmed.
Feel free to comment and add more games.