Cheat mode:
Press [Esc] when the game begins. Select the "File" and "Preference" menu items to enable invincibility and unlimited weapons.

Level select:
Enter MACTOPACE as a name to unlock all historical missions.

Skip training missions:
Quit a training mission, then click on the arrows next to the "Level 1/1" box. Note: This only works until level 5.

Unlimited ammunition:
Enable [Caps Lock], type win, then disable [Caps Lock] while flying to enable an unlimited ammo selection on the option screen.

Santa Claus:
Set the Macintosh system date to December 25 and begin game play. Santa Claus will appear in the crowd in the main room of the Independence.