This list will cover compatibility between games with DLC and title updates installed and those without. Compatibility ratings are made under the assumption that all downloadable content available was installed.
Amped 2
Intercompatible. as long as DLC maps aren’t selected.
Brothers In Arms: Earned In Blood
Intercompatible. as long as DLC maps aren’t selected.
Brute Force
Incompatible. You will not see lobbies.
Counter-Strike
[CONTENT ONLY] Fully intercompatible (DLC on disc).
[TITLE UPDATE] Incompatible. You will not see lobbies.
Crimson Skies: High Road to Revenge
[CONTENT ONLY] Intercompatible as long as DLC planes aren’t selected.
[TITLE UPDATE] Incompatible. Game will not load.
Doom 3
Intercompatible as long as DLC maps aren’t selected.
Forza Motorsport
Incompatible. You will not see lobbies.
Full Spectrum Warrior: Ten Hammers
Intercompatible as long as DLC maps aren’t selected.
Ghost Recon
Fully intercompatible.
Ghost Recon: Island Thunder
Backwards compatible. DLC users may join non DLC hosts but not the other way around (DLC disabled upon joining).
Ghost Recon 2: Summit Strike
Backwards compatible. DLC users may join non DLC hosts but not the other way around (DLC disabled upon joining).
Halo 2
Intercompatible as long as DLC maps aren’t selected.
Iron Phoenix
Intercompatible as long as DLC maps aren’t selected.
Mechassault
Incompatible. You will not see lobbies.
Mechassault 2: Lone Wolf
Incompatible. You will not see lobbies.
Midtown Madness 3
Fully intercompatible. DLC tracks can be played without having them. When DLC cars are selected, they appear as different cars for people without them installed.
MotoGP 3
Incompatible. You will not be able to connect.
Phantom Dust
Intercompatible. DLC users will be able to play with non-DLC users, however non-DLC users will have their game freeze if a DLC user attempts to use a skill above 300. There will also be gameplay abnormalities, such as inconsistent damaging and projectiles disappearing midair.
Project Gotham Racing 2
Intercompatible as long as Paris and Long Beach race tracks aren’t selected.
Rainbow Six 3
Incompatible. You will see games, but you will get kicked to the main menu upon trying to join.
Rainbow Six 3: Black Arrow
Incompatible. You will see games, but you will get kicked to the main menu upon trying to join.
Rallisport Challenge 2
Incompatible. You will not see lobbies.
Return To Castle Wolfenstein
Intercompatible as long as DLC maps aren’t selected.
Splinter Cell: Pandora Tomorrow
Incompatible. You will see matches but will receive an error message upon trying to join.
Splinter Cell: Chaos Theory
Co-op: Incompatible. You will not see lobbies.
Versus: Incompatible. You will see matches but will receive an error message upon trying to join.
Star Wars: Battlefront II
Incompatible. You will not see lobbies.
Star Wars: Republic Commando
Fully intercompatible (DLC on disc).
Steel Battalion: Line of Contact
Fully intercompatible.
Timesplitters: Future Perfect
Fully intercompatible.
Unreal Championship 2
[CONTENT ONLY] Intercompatible as long as DLC maps aren’t selected. DLC skins are fine.
[TITLE UPDATE] Incompatible. The game will freeze upon joining.
Unreal Championship
Intercompatible as long as DLC maps aren’t selected.
Needs Testing List:
Brothers In Arms: Road To Hill 30
Far Cry: Instincts
Far Cry: Instincts Evolution
Ghost Recon 2 – possibly backwards compatible
Midnight Club 3: Dub Edition
Tron 2.0: Killer App
Links 2004
Rainbow Six: Critical Hour
Rainbow Six: Lockdown
Soldier of Fortune 2
Spikeout: Battle Street
Star Wars: Battlefront
Star Wars: The Clone Wars
TOCA Race Driver 2
Top Spin
Unreal 2: The Awakening
