Master code:
Hold L1 then press X(5), Circle, R1, R2(2), R1 at the main menu, Then, press Start during game play and activate any option at the cheat menu.
Unlimited ammunition:
Press Down, Right, Up, Left, L2, L1, R2, R1 at the main menu. Then, press Start during game play and activate that option at the cheat menu.
Unlimited life:
Press Left(3), Right, L2, L1, R2, R1 at the main menu. Then, press Start during game play and activate that option at the cheat menu.