Faster enemy reflex:
Press X(2), Square(2), Triangle(2),
Circle(2), Triangle(2), Square(2), X(2),
R3 during game play while Wolverine is on screen and controllable.
You will gain double reflex with every kill.

Unlimited rage:
Press Triangle, Square(2), Triangle,
Circle(2), Triangle, X(2), Triangle,
R3 during game play while Wolverine is on screen and controllable.

Immortality:
Press Square, X(2), Square, Triangle(2),
Square, Circle(2), Square, R3 during
game play while Wolverine is on screen and controllable. Although
you will lose health you cannot die.

Wolverine's classic yellow and blue costume:

Press X, Square, Circle, Square,
X, Triangle, X, Triangle, X,
Square, Circle(2), Square, R3 during
game play while Wolverine is on screen and controllable. Then,
exit to the main menu and switch costumes.


Berserk difficulty:
Successfully complete the game. You can start a new
game session with the completed game file with any difficulty,
including Berserk, with all previously earned experience and skills.