God Mode:
     While playing, press Right, Left, Down, Up, L +R. This cheat only
works in single player mode.

Unlimited Weapons:
     While  playing,  press Triangle, Triangle, Down, Down. This cheat
only works in single player mode.

Mega Guns:
     While  playing,  press  X, Triangle, X, Triangle. This cheat only
works in single player mode.

Killer Weapons:
     While playing, press X, X, Up, Up, L +R. This cheat only works in
single player mode.

Play as Axel:
     Successfully complete the Russia mini-game in story mode.

Play as Cousin Eddy and Gene Ruttish:
     Successfully complete the L.A./Cousin Eddy mini-game in story mode.

Play as Crimson Fury:
     Successfully complete the Monaco mini-game in story mode.

Play as Dark Tooth:
     Successfully complete story mode in single player mode.

Play as Hammerhead:
     Successfully complete the Tokyo Rooftop mini-game in story mode.

Play as Mr. Slam:
     Successfully complete the L.A. mini-game in story mode.

Greece Deathmatch level:
     Successfully complete the Greece mini-game.

Egypt Deathmatch level:
     Successfully complete the Egypt mini-game.

Paris Deathmatch level:
     Successfully complete the Paris mini-game.

Rose Deathmatch level:
     Successfully complete the Rome mini-game.

Tokyo Streets Deathmatch level:
     Complete the Tokyo Streets mini-game.

Tower Tooth Challenge level:
     Successfully  complete  the  game  with  any four characters. The
Tower Tooth Challenge level will now be unlocked in challenge mode.