Note:
The phrase "Secret code accepted" will be spoken to confirm correct code entry. 

Invincibility:
Press Up, Down, Left, Right, Left(2), Right(2), L(2), R(2), White, Black at the menu 
with "Continue" and "New Game" options.

Unlimited ammunition:
Press Up, Right, Down, Left, Up, Right, Down, Left, L, R at the menu 
with "Continue" and "New Game" options. 

Big heads:
Press Right, Up, Left, Down, Right, Up, Left, Down, Right, L, R, L, R at the menu 
with "Continue" and "New Game" options. 

All instant action levels:
Press Up, Down, Left, Right, L, R, L, R at the menu with "Continue" and "New 
Game" options. 

Unknown:
Press Down, Up(2), Down, Left, Right, L, R, L, R at the menu with "Continue" 
and "New Game" options. 

Unknown:
Press Up, Down, Right, Left, Up, Down, Left, Right, L, R, L, R at the menu 
with "Continue" and "New Game" options. 

Unlock X-Wing:
Successfully complete all campaign and challenge missions to unlock 
the X-Wing in Instant Action mode.

Unlock TIE Fighter:
Successfully complete all campaign and challenge missions to 
unlock the TIE Fighter in Instant Action mode.