Cheat mode

Once the game has begun, move to the right until you arrive at a location with a teddy bear. Turn towards the wall and press Circle to jump in its direction. A muted sound will be heard if done correclty. Move forward and walk in the next room to the right of this location, which leads down into a small room. Press Circle to access a platform. Use this platform to reach a playroom and activate cheat mode. The following codes may now be enabled during game play

Invincibility

press X(4), Triangle, Circle, X, Square on controller two.

All weapons

press Circle(3), Triangle(2), X(2), Square on controller two.

Level select 

press Triangle(3), Square(3), X(2), Circle on controller two.