At the "Game Information" screen, select "Options" > "Codes". Activate the following cheats by entering the corresponding codes. Repeat a code entry to disable its effect.

CHEAT FUNCTION - CHEAT CODE
Level select - IPULATOR
All movies unlocked - DEXTERCROWLEY
All art unlocked - SIRULLY
All combat upgrades - DOGTAGS
All Black Book graffiti and Truth Pieces - SHARDSOFGLASS
All characters unlocked - STATEYOURNAME
All beat down arenas - WORKBITCHES
Maximum health - BABYLONTRUST
Maximum skills - VANCEDALLISTER
Unlimited health - MARCUSECKOS
Unlimited skills - FLIPTHESCRIPT
All iPod songs - GRANDMACELIA
All legends unlocked - NINESIX