Hold R2 and press Left, Right, Up
Depth Charges
L1, R1, L1, R1, Up, Down, Up, Up
Drop Pods
Hold Triangle and press R1 + L1. Move the missles with the D-Pad and press R1 + L1 to detonate.
Guided Missiles
L1, R1, L1, R1, Up, Down, Left, Down
Infinite weapons
L1, R1, L1, R1, Up, Down, Left, Right
Invincibility
Hold R2 and press Right, Left, Down
Lay a Mine
R1, R2, R1, R2, Up, Down, Up, Down
Quadruple Damage
Hold R2 and press Right, Left, Up
Stun Blasts
Hold R2 and press Left, Right, Down
Surface Mines