Invulnerability
Hold down Ctrl-Alt-Shift-Home simultaneously.

Full in-air refuel and reload
Hold down Ctrl-Alt-Shift-Insert simultaneously.

GameTips
Tip: In missions where you're swarmed by enemy aircraft, let your wingmen do the lion's share of the work.

Tip: You can maintain stealth longer by switching to manual EMCON and keeping yourself set at EMCON 1.

Tip: To get your wingmen to attack ground targets, be sure you're in air-to-ground mode with a target locked before you issue the "engage my target" command (the M key).