During gameplay, enter codes and a sound will confirm correct code:
X, B, X, B, Black - Extra Tokens (10)
Y, X, B, Y, Black - All planes Unlocked
B, X, A, B, Black - Big Time guns (1000 points damage per shot)
A, Y, A, Y, Black - Cash money ($5000)
Y, A, X, B, Black - God-like mode
X, B, A, X, Black - Unlock Super Hard Difficulty.
Outhouse in Arixo:
In the Arixo Dessert, go to the place where you steal the mini-gyro for Carl. Fly farther beyond that, and you will see a mission action icon, only it's green instead of blue. Fly near it a press the action button, and Nathan will land his plane and walk into an outhouse! After a while, Nathan will exit the outhouse and get back into the plane.