When in a battle, whether it in story, instant action or galactic conquest. Pause the game and enter the following codes:
Infinite Ammo
Up, Down, Left, Down, Down, Left, Down, Down, Left, Down, Down, Down, Left, Right
Invincibility
Up, Up, Up, Left, Down, Down, Down, Left, Up, Up, Up, Left, Right
Alternate Soldiers
Down, Down, Down, Up, Up, Left, Down, Down, Down, Down, Down, Left, Up, Up, Up, Left
Alternate Sounds
Up, Up, Up, Left, Up, Down, Up, Up, Left, Down, Down, Down, Left, Up, Down, Down, Left, Right
No Heads Up Display
Up, Up, Up, Up, Left, Up, Up, Down, Left, Down, Up, Up, Left, Right
Slow Motion Sounds
Left, Up, Down, Up, Up, Left, Down, Down, Down, Left, Up, Down, Down, Left, Righ