X-Wing Alliance

Cheat mode:
Press [Esc] before starting a mission and enter the "General Options" menu. Then, enable the "Tour Invulnerable" or "Unlimited Ammo" options. Note: This will result in less points, no bonus points, and no medals during the game.
Information in this section was contributed by Born2bgrk.

Hidden picture:
After playing a combat simulator skirmish or combat engagement, a screen will appear with your score and those of any other players. At this screen, press [Shift] + [Ctrl] + [Alt] to view a hidden screen.
Information in this section was contributed by oneblah2.

All missions and medals:
Create a new pilot and enter FongFong as a name. Start the game, then immediately exit. Enter the "\lucasarts\xwingalliance\" folder and delete the "fongfong0.plt" file. Start the game again. All missions, intermission sequences, and medals will be unlocked.