Enter these codes on the password screen.

• Disable Cheats -- Square, Square, X, Circle (x4), Triangle
• Firewalls -- X, X, Square, X, X, X, Triangle, Triangle
• Hidden Ship -- X, X, X, Square, Triangle, Circle, X, Triangle
• No Bonus Reset after Death -- Square, Triangle, X, Triangle, Circle, Square, Triangle, X
• Select Bonus Level -- Square, Square, Square, Triangle, Circle, Triangle, Square, Square
• Select Level -- Square Circle, X, Triangle (x2), X, Circle, X
• Water Effects -- Circle, X, Square, Triangle (x2), Circle, Triangle, Circle
• Weapons -- Square, X, Circle, Square, X, Square, Circle, Square
• Unlimited Lives -- Circle, X, X, Triangle, Square, Triangle, Square, Circle

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N2O: Nitrous Oxide cheats

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N2O: Nitrous Oxide

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