To activate a cheat, pause the game and enter its code below. (Note: reenter code to deactivate.)

• A defensive missile becomes 6 -- R1 (3), Select (2), X (2)
• Ammo (defensive weapons) -- L1 (3), Select (4)
• Ammo (special weapons) -- X, Select (2), L1 (3), R1, L1, R1, L1
• CPU aid -- Select, R1 (3), X, L2 (2)
• Fire from all active defense silos -– R1, L1, R1, X (4)
• Level skip -- X, L1 (2), R1 (2), X, L1 (Zoom in/out to change levels and press Triangle to confirm.)
• Produce all mobile units -- R1, L1, Select (2), X (2), L1
• Shield selected country -- X, Select (2), R1 (3), L1 (2), R1
• Show enemy submarines -- L1, R1, X (4), L1 (2)
• Transform Special Forces into Super Fighters -- Select, X, Select, X, L1 (2), R1