Unlimited health:
     While  playing,  hold down the L trigger and press A, A, B, B, Y,
Y, A, X.

Unlimited ammo:
     While  playing,  hold down the L trigger and press A, A, B, B, X,
Y, A, X.

Unlock concept videos:
     Successfully  complete  the  game and allow the ending credits to
complete. Two concept videos about the game will start.