Wasn't sure where to put this, but you can get all of the DLC for Gears of War 2 (Flashback, Combustible, Snowblind, Road to Ruins) for only 800 Microsoft Points. I believe it only lasts until the end of this week.
163/164 games completed (including DLC)
Completion percentage: 100%
Latest retail completion: Dragon Age II
Latest arcade completion: Dust: An Elysian Tail
Currently Ranked #1 on Achievement Completion Percentage Leaderboard on TA