Secret Weapons Over Normandy cheats and cheat codes for Playstation 2

Cheats:
Go to the menu with "Continue" and "New Game" options, and press the
following button combinations. The phrase "Secret code accepted" will 
be spoken, if the codes are accepted.

Stage select:
Square, Square, Square, Circle, Circle, Circle, Triangle, Square. 
After, press R2, R2, L2, L2.

Unlock every instant action levels:
Up, Down, Left, Right, L1, R1, L1, R1.

Unlock every planes and missions:
Triangle, Triangle, Triangle, Square, Square, Square, L1, R1, R2, R2, L2, L2.

Unlock every environments:
Down, Up, Up, Down, Left, Right, L1, R1, L1, R1.

Invulnerability:
Up, Down, Left, Right, Left, Left, Right, Right, L1, L1, R1, R1, L2, R2.

Unlimited ammo
Up, Right, Down, Left, Up, Right, Down, Left, L1, R1.

More instant replay views:
Up, Down, Left, Right, R1, R1, L1, L1.

Giant heads:
Right, Up, Left, Down, Right, Up, Left, Down, Right, L1, R1, L1, R1.

Unknown:
Up, Down, Right, Left, Up, Down, Left, Right, L1, R1, L1, R1.

Unlock X-Wing:
Finish all campaign and challenge missions

Unlock TIE Fighter:
Finish all campaign and challenge missions

Get All Medals:
Beat all of the secondary objectives on the first try.

Unlock XP-55
Sink all patrol boats in Mosquito Bite

Unlock Dornier 335:
Finish the game with 100% completion. (Complete all secondary and bonus 
objectives in every level)