these games given below have been played by me so if i miss out on some game by these developers plz forgive and mention too
ummm...where should i start from, let me see.....OK here goes....
UBISOFT - for FARCRY, POP series, Splinter cell series, and now BIA series.
EA GAMES - for the NFS series, MOH series, BF2, COD series (is it by EA?)
EA SPORTS - for the FIFA series.
KONAMI - for the silent hill series and the PES series.
ID - for DOOM and Quake series.
VALVE - for HL, HL2 and the CS series.
EIDOS - for HITMAN series.
MSSTUDIO - for HALO, flight simulator
ROCKSTAR - for Max Payne 2 and GTA series
ACTIVISION - for Return to castle wolfenstein and wolfenstein enemy territory, shadow ops:red mercury.
THQ - for MOTO GP series.
and many more mentionable games whos developers i don't remember like the serious sam series, MAFIA series, UT 2003 and 2004, The Great Escape (it was MGM studios i think).