Highlight Raekwon at the Character selection screen, then Hold Select and press X
Bone Gear
Highlight GZA at the character selection screen, then hold Select and press X
Cerith
Highligh RZA at the Character selection screen, then hold select and press X
Fearmentor
Highlight Masta Killa at the character selection screen, then hold select and press X
Gasche
Highlight Method Man at the character selection screen, then hold Select and press X
Hystrix
Highlight ODB at the character selection screen, then hold Select and press X
Lecher
Highlight Ghostface Killer at the character selection screen, then hold Select and press X
Otis
At the password screen press Triangle, Circle, X, X, Square, Triangle, Circle, Square
Parental Lock Code
Highlight U-God at the character selection screen, then hold Select and press X
Sinesis
At the main menu press Right, Right, Right, Right, Left, Left, Left, Left, Square, Circle, Square, Circle
Unlock all characters
Highlight Inpecta Deck at the character selection screen, then hold Select and press X
Xin