Secret Weapons Over Normandy Codes -

Invincibility:
Press , , , , (x2), (x2), (x2), (x2), , at the menu with "Continue" and "New Game" options. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly. Your aircraft will still take damage, but will not be destroyed.

Unlimited ammunition:
Press , , , , , , , , , at the menu with "Continue" and "New Game" options. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly. When you fire your weapons, the current number of rounds remaining will increase to 9999.

Level select:
Press (x3), (x3), , for the first part of the code at the menu with "Continue" and "New Game" options. Then, press (x2), (x2) for the second part of that code. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly.

Big heads:
Press , , , , , , , , , , , , at the menu with "Continue" and "New Game" options. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly.

All instant action levels:
Press , , , , , , , at the menu with "Continue" and "New Game" options. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly.

All planes and missions:
Press (x3), (x3), , , (x2), (x2) at the menu with "Continue" and "New Game" options. The phrase "Secret code accepted" will be spoken twice to confirm correct code entry.

All environments:
Press , (x2), , , , , , , at the menu with "Continue" and "New Game" options. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly.

More instant replay views:
Press , , , , (x2), (x2) at the menu with "Continue" and "New Game" options. You will hear the phrase SECRET CODE ACCEPTED if you have entered the code correctly.