Resident Evil: The Umbrella Chronicles Cheats

Unlock Cooperative Mode in ALL Missions
To unlock Cooperative mode in all missions, including the sub-missions (Wesker's missions), simply complete "The Fourth Survivor" sub-mission on any difficulty. An option will appear on the right when selecting characters that looks like two pistols and says "begin play with 2 players". Both players play as the same character, there are just two aiming reticles on the screen to play with.