Only games with registered users are listed here.

Xbox 360

Ace Combat 6: Fires of Liberation (17 users)
All-Pro Football 2K8 (19 users)
Armored Core 4 (5 users)
Army of Two (11 users)
Battlefield 2: Modern Combat (1 user)
Battlefield: Bad Company (7 users)
Battlestations: Midway (3 users)
Beautiful Katamari (31 users)
Big Bumpin' (12 users)
BlackSite: Area 51 (2 users)
Blazing Angels 2: Secret Missions of WWII (2 users)
Blazing Angels: Squadrons of WWII (1 user)
Bomberman: Act Zero (2 users)
Borderlands (6 users)
Burnout Paradise (31 users)
Burnout Revenge (37 users)
Call of Duty 2 (32 users)
Call of Duty 3 (25 users)
Call of Duty 4: Modern Warfare (110 users)
Call of Duty: Modern Warfare 2 (11 users)
Call of Duty: World at War (13 users)
Call of Juarez (3 users)
Chromehounds (26 users)
Civilization Revolution (14 users)
College Hoops 2K6 (1 user)
College Hoops 2K7 (1 user)
Command & Conquer 3: Tiberium Wars (9 users)
Condemned 2: Bloodshot (5 users)
Crackdown (90 users)
Culdcept Saga (4 users)
Dance Dance Revolution Universe (3 users)
Dance Dance Revolution Universe 2 (4 users)
Dark Messiah Might and Magic: Elements (2 users)
Dead or Alive 4 (26 users)
DiRT (7 users)
EA Sports Fight Night Round 3 (19 users)
Enchanted Arms (14 users)
Fable 2 (35 users)
Far Cry Instincts Predator (4 users)
F.E.A.R. (12 users)
F.E.A.R. 2: Project Origin (2 users)
FIFA 06: Road to FIFA World Cup (1 user)
FIFA Soccer 07 (2 users)
FIFA Soccer 08 (5 users)
FlatOut Ultimate Carnage (1 user)
Forza Motorsport 2 (96 users)
Forza Motorsport 3 (10 users)
Frontlines: Fuel of War (1 user)
Full Auto (2 users)
Fusion Frenzy 2 (4 users)
Gears of War (145 users)
Gears of War 2 (42 users)
Grand Theft Auto IV (96 users)
Guitar Hero 2 (63 users)
Guitar Hero 3 (74 users)
Guitar Hero 5 (1 user)
Guitar Hero Aerosmith (1 user)
Guitar Hero Metallica (1 user)
Guitar Hero Van Halen (1 user)
Guitar Hero: World Tour (13 users)
Halo 3 (161 users)
Halo: Reach (10 users)
Halo Wars (11 users)
Hour of Victory (1 user)
Kameo: Elements of Power (35 users)
Kane and Lynch: Dead Men (5 users)
Kengo: Legend of the 9 (1 user)
Kingdom Under Fire: Circle of Doom (2 users)
Left 4 Dead (17 users)
Lego Rock Band (4 users)
LEGO Star Wars II: The Original Trilogy (33 users)
LEGO Star Wars: The Complete Saga (26 users)
Looney Tunes: Acme Arsenal (1 user)
Lost Planet: Extreme Condition (27 users)
Lost Planet Extreme Condition: Colonies Edition (3 users)
Madden NFL 06 (1 user)
Madden NFL 07 (9 users)
Madden NFL 08 (19 users)
Madden NFL 09 (6 users)
Major League Baseball 2K6 (2 users)
Major League Baseball 2K7 (8 users)
Marvel: Ultimate Alliance (58 users)
Marvel Ultimate Alliance 2 (1 user)
Mass Effect 3 (2 users)
Medal of Honor Airborne (3 users)
Mercenaries 2: World in Flames (8 users)
MotoGP '06 (2 users)
MotoGP '07 (1 user)
Naruto: Rise of a Ninja (3 users)
NASCAR 08 (1 user)
NBA 2K6 (2 users)
NBA 2K7 (5 users)
NBA 2k8 (3 users)
NBA Live 06 (3 users)
NCAA Football 07 (11 users)
NCAA Football 08 (2 users)
NCAA Football 09 (3 users)
Need For Speed: Carbon (6 users)
Need for Speed Most Wanted (13 users)
NFL Tour (1 user)
NHL 07 (7 users)
NHL 08 (9 users)
NHL 09 (5 users)
NHL 2K6 (1 user)
NHL 2K7 (5 users)
NHL 2K8 (1 user)
Over G Fighters (1 user)
Overlord (34 users)
Perfect Dark Zero (27 users)
Phantasy Star Universe (3 users)
Pocketbike Racer (14 users)
Prey (15 users)
Pro Evolution Soccer 2008 (1 user)
Project Gotham Racing 3 (43 users)
Project Gotham Racing 4 (21 users)
Quake 4 (10 users)
Resident Evil 5 (7 users)
Ridge Racer 6 (6 users)
Rock Band (77 users)
Rock Band 2 (44 users)
Rock Band 3 (3 users)
Rockstar Games presents Table Tennis (21 users)
Rumble Roses XX (4 users)
Sacred 2 (1 user)
Saints Row (26 users)
Saints Row 2 (6 users)
Samurai Warriors 2 Empires (1 user)
SEGA Rally Revo (2 users)
Sega Superstars Tennis (3 users)
Shadowrun (11 users)
Skate (15 users)
Soul Calibur IV (13 users)
Star Trek: Legacy (5 users)
Stranglehold (5 users)
Street Fighter IV (12 users)
Stuntman: Ignition (2 users)
Tenchu Z (5 users)
Test Drive Unlimited (5 users)
Tetris Evolution (5 users)
The Beatles Rock Band (2 users)
The BIGS (2 users)
The Club (3 users)
The Darkness (18 users)
The Lord of the Rings, The Battle for Middle-earth II (10 users)
The Orange Box (72 users)
The Outfit (3 users)
Tiger Woods PGA Tour '06 (2 users)
Tiger Woods PGA Tour '07 (8 users)
Tiger Woods PGA Tour '08 (5 users)
Tiger Woods PGA Tour '09 (3 users)
Tiger Woods PGA Tour '10 (1 user)
TimeShift (3 users)
Tom Clancy's Ghost Recon Advanced Warfighter (35 users)
Tom Clancy's Ghost Recon Advanced Warfighter 2 (26 users)
Tom Clancy's Rainbow Six: Vegas (36 users)
Tom Clancy's Rainbow Six: Vegas 2 (17 users)
Tom Clancy's Splinter Cell Double Agent (13 users)
Tony Hawk's American Wasteland (1 user)
Tony Hawk's Project 8 (13 users)
Tony Hawk's Proving Ground (3 users)
Too Human (12 users)
Top Spin 2 (4 users)
Top Spin 3 (1 user)
Turok (1 user)
Two Worlds (3 users)
UEFA Champions League 2006-2007 (1 user)
Vampire Rain (1 user)
Virtua Fighter 5 (9 users)
Virtua Tennis 3 (6 users)
Viva Piñata (54 users)
Viva Piñata: Party Animals (7 users)
Viva Piñata: Trouble in Paradise (8 users)
WarTech Senko no Ronde (4 users)
WWE SmackDown vs. RAW 2007 (2 users)

Xbox Live Arcade

3D Ultra Minigolf Adventures (3 users)
3 on 3 NHL Arcade (1 user)
Aegis Wing (63 users)
Age of Booty (7 users)
A Kingdom for Keflings (9 users)
Alien Hominid HD (21 users)
Arkadian Warriors (11 users)
Assault Heroes (27 users)
Band of Bugs (6 users)
Banjo Kazooie: Nuts and Bolts (4 users)
Bankshot Billiards 2 (12 users)
Battlefield 1943 (6 users)
Battlestar Galactica (5 users)
Beat'n Groovy (1 user)
Bomberman Live (40 users)
Boogie Bunnies (3 users)
Boom Boom Rocket (16 users)
Carcassonne (87 users)
Castle Crashers (43 users)
Catan (54 users)
Chessmaster Live (4 users)
Cloning Clyde (11 users)
Commanders: Attack of the Genos (3 users)
Contra (17 users)
Doom (29 users)
Double Dragon (10 users)
Duke Nukem 3D (7 users)
E4: Every Extend Extra Extreme (9 users)
Eets: Chowdown (1 user)
Fatal Fury Special (2 users)
Frogger (12 users)
Gauntlet (20 users)
Geon: Emotions (1 user)
Golden Axe (6 users)
Gripshift (2 users)
Gyruss (4 users)
Hardwood Backgammon (6 users)
Hardwood Hearts (2 users)
Hardwood Spades (1 user)
Heavy Weapon (16 users)
Hexic 2 (21 users)
Ikaruga (15 users)
Jetpac Refuelled (4 users)
Joust (15 users)
Lumines Live! (23 users)
Mad Tracks (4 users)
Marathon: Durandal (13 users)
Marble Blast Ultra (18 users)
Marvel vs. Capcom 2 (4 users)
Metal Slug 3 (4 users)
Mr. Driller Online (1 user)
Mutant Storm: Empire (3 users)
N+ (18 users)
Novadrome (1 user)
Paperboy (5 users)
Perfect Dark (1 user)
Pinball FX (10 users)
Puzzle Quest: Challenge of the Warlords (26 users)
Robotron 2084 (7 users)
Rush'n Attack (1 user)
Scramble (3 users)
Shadow Assault/Tenchu (1 user)
Small Arms (19 users)
Smash TV (12 users)
Soltrio Solitaire (5 users)
Sonic The Hedgehog 2 (7 users)
Splosion Man (8 users)
Spyglass Board Games (5 users)
Street Fighter II: Hyper Fighting (20 users)
Streets of Rage 2 (7 users)
Street Trace NYC (1 user)
Super Contra (5 users)
Super Puzzle Fighter II Turbo HD Remix (14 users)
Super Street Fighter II Turbo HD Remix (7 users)
Switchball (4 users)
Tetris Splash (5 users)
Texas Hold'em (32 users)
Ticket to Ride (12 users)
Time Pilot (5 users)
TMNT 1989 Arcade (25 users)
Track & Field (4 users)
Tron (1 user)
Ultimate Mortal Kombat 3 (10 users)
Undertow (51 users)
UNO (57 users)
Wik and the Fable of Souls (11 users)
Wing Commander Arena (3 users)
Word Puzzle (1 user)
Worms (45 users)
Yaris (20 users)
Yie Ar Kung-Fu (2 users)

Xbox

Halo (38 users)
Halo 2 (44 users)