TimeSplitters Future Perfect can support 4 players per console (splitscreen) and up to 4 consoles (16p max) apparently.
25 To Life
Armored Core - Last Raven
Armored Core - Nine Breaker
ATV Offroad Fury 4
Call of Duty 2 Big Red One
Colin McRae Rally 2005
Conflict - Global Storm
DTM Race Driver 2
Gran Turismo 4
IndyCar Series 2005
Jak X
Juiced
Midnight Club 3: DUB Edition
Midnight Club Dub Edition - Remix
MotoGP 4
Nascar Thunder 2004
OutRun 2006
Project Snowblind
Rainbow Six Lockdown
SOCOM II: US Navy Seals
SOCOM III - US NAVY SEALS
SOCOM IV - Combined Assault
Splinter Cell Choas Theory
Star Wars Battlefront 2
Street Racing Syndicate
TimeSplitters 2
TimeSplitters 3: Future Perfect
Toca Race Driver 3
Tony Hawk's Underground
Virtual On
Unreal tournament (ilink?)
Gran turismo 3 (ilink?)
25 To Life
Armored Core - Last Raven
Armored Core - Nine Breaker
ATV Offroad Fury 4
Call of Duty 2 Big Red One
Colin McRae Rally 2005
Conflict - Global Storm
DTM Race Driver 2
Gran Turismo 4
IndyCar Series 2005
Jak X
Juiced
Midnight Club 3: DUB Edition
Midnight Club Dub Edition - Remix
MotoGP 4
Nascar Thunder 2004
OutRun 2006
Project Snowblind
Rainbow Six Lockdown
SOCOM II: US Navy Seals
SOCOM III - US NAVY SEALS
SOCOM IV - Combined Assault
Splinter Cell Choas Theory
Star Wars Battlefront 2
Street Racing Syndicate
TimeSplitters 2
TimeSplitters 3: Future Perfect
Toca Race Driver 3
Tony Hawk's Underground
Virtual On
Unreal tournament (ilink?)
Gran turismo 3 (ilink?)