Press (Up), (Down), (Left), (Right),J ,L ,J ,L at the menu with "Continue" and "New Game" options.
Big Heads
Press (Right), (Up), (Left), (Down), (Right), (Up), (Left), (Down), (Right), J, L, J, L at the menu with "Continue" and "New Game" options.
Invincibility
At main menu, press- Up, Down, Left, Right, Left, Left, Right, Right, J, J, L, L, PageUp, PageDown.
More Instant Replay Views
Press (Up), (Down), (Left), (Right),L,L,J,J at the menu with "Continue" and "New Game" options.
Unlimited Ammunition
Enter Up, Right, Down, Left, Up, Right, Down, Left, J, L during gameplay.
Unlock Star Wars vehicles
Complete the Secret Weapons Over Normandy 15-mission campaign and all 21 Challenge missions. If you do well enough you will unlock the tie fighter and x-wing craft from Star Wars.