Enter the following cheats at the title screen:
All characters
Press R1, R2, X, Left, Right, Square, Square, Square, Square,
L1, Square, Triangle, Circle
All weapons
Press L1, R1, X, X, Triangle, R1, R1, Triangle, Square, X, R1
Challenge mode
Press L2, R2, Triangle, Right, Left, Up, Up, Left, R2, R2, R2, Circle
Two players in Story and Free modes
Press L1, R2, Circle, Circle, Triangle, L2, R1, Circle, Triangle, Circle
Free mode with initial weapons unlocked
Press L1, R1, L2, R2, L2, Circle, R2, Up, R2, R2, Circle, X, R1.
Can select same character in Multiplayer mode
Press R2, R2, Square, Square, X, R2, L1, Up, Down, Up, Up, Up, Circle.
Free mode:
Press L1, R1, Left, Left, Left, Left, Left, Left, L2, Up, Triangle,
Triangle, Right
Bonus weapon in multi-player mode:
Press L2, L2, X, X, Triangle, R1, R1, Square, R1
Unlockable Characters and Groups in Multiplayer Mode:
Win mission 67 in story mode - Alex
Win mission 46 in story mode - Chris
Win mission 99 in story mode - Mushin-Kai & Tin Jiao
Win mission 70 in story mode - Outlaws, Shadow Platoon, Bain & Cooper
Win mission 60 in story mode - Park
Win mission 30 in story mode - Westside Gym, Zaps & KG
Unlock Other characters:
Win One Stage Of Free Mode - Marshall Law
Win The Challenge Mode - Paul Phoenix
Win all chapters on free mode with S rank in all missions - Bordin
Win chapter 3 on free mode with B or above in all missions - Golem
Win chapter 1 on free mode with C or above in all missions - Kelly
Win chapter 1 on free mode with B or above in all missions - Lilian
Win chapter 3 on free mode with C or above in all missions - Ling Fong
Win chapter 2 on free mode with B or above in all missions - McKinzie
Win chapter 2 on free mode with C or above in all missions - Napalm99
Win all chapters on free mode with A rank in all missions - Shinkai
Win chapter 1 on free mode with D or above in all missions - Vera Ross
Unlock challenge and free mode:
Win the game
