Unlock Everything
When you first start the game, you have limited access to levels, ship types and special features such as videos. Normally, you would have to play through the game multiple times to unlock these features. For full access to everything in the game, type "PNYRCADE" into the Codes menu for the PS2 version, or "LONGO" for the Xbox version.
Invincibility
Some people call it "God Mode," "Invincibility" or "Invulnerability," but it all means the same thing -- you will not take any damage to your ship no matter how many times you crash into things or get shot. To enable this code, type "QUENTIN" into the Codes menu for the PS2 version, or "ARTOO" for the Xbox version.
Mara Jade's Ship
Mara Jade, who fans of the expanded "Star Wars" universe know as a special agent to Emperor Palpatine, has a very powerful ship called the Z-95 Headhunter. The ship has homing missiles and very powerful lasers, giving you an edge for those tough missions. Type "HEADHUNT" into the Codes menu for the PS2 version, or "HUNTER" for the Xbox version to unlock this ship.
Reverse Controls
Reverse the X-axis and Y-axis on your controls for a different flying experience. Some players have an easier time playing flight-simulation games when the controls are reversed and some do not -- it's simply a matter of preference. See which control setup best suits you by typing "JARJAR" into the Codes menu. This works for both versions of the game.
Other Codes
"Star Wars: Jedi Starfighter" has additional codes that generally do not make the game any easier, but they do alter the game's appearance. For a more cinematic style of gameplay, try getting rid of your Heads-up Display (HUD) and enabling Fly-By Mode. The latter changes the camera angle to make the game look more like a movie. Type "NOHUD" for PS2 or "CONVISTA" for Xbox into the Codes menu to get rid of the HUD and type "DIRECTOR" for PS2 or "DARON" for Xbox to place the game in Fly-By Mode.