Resident Evil: The Umbrella Chronicles Cheats

To unlock the items from past Resident Evil games, you need to earn an "A" or "S" rank on the respectable chapter. For Normal, one must acquire an A rank or higher to get the item. For hard, one needs an S rank.

To unlock the extra sub-scenarios you need to complete certain scenarios with certain ranks.

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.

Get an S rank in all the missions on Hard to be able to upgrade a weapon to level 5 for unlimited ammo.