Here you can find a listing of all the games that have content on the Marketplace

2006 FIFA World Cup
Amped 3
Battlefield 2: Modern Combat
Blazing Angels
Burnout Revenge
Call of Duty 2
College Hoops 2K6
Condemned: Criminal Origins
Dead or Alive 4
Dead Rising
Dynasty Warriors 5 Empires
F.E.A.R.
FIFA 06: Road to FIFA World Cup
Fight Night Round 3
Final Fantasy XI
Full Auto
Gun
Halo 3
Hitman: Blood Money
Kameo: Elements of Power
King Kong
LOTR, BFMEII
Lost Planet
Madden 06
MLB 2K6
MotoGP '06
NBA 2K6
NBA Live 06
Need for Speed Most Wanted
NHL 2K6
Oblivion
Perfect Dark Zero
Project Gotham Racing 3
Quake 4
Ridge Racer 6
Rockstar presents Table Tennis
Rumble Roses XX
Superman Returns
Test Drive Unlimited
The Outfit
Tiger Woods PGA Tour 06
Tomb Raider: Legend
Top Spin 2
Tom Clancy's Ghost Recon Advanced Warfighter
Tony Hawk's American Wasteland