Wing Commander 3  
 
Start the game with WC3 -mitchell
 
Eventually, you will hear someone yell "Mitchell!" during the scene of
Blair preparing to launch.  Target an enemy and press Ctrl-W
 
While playing with this cheat:
 
ALT-D  Debug info
ALT-Y  Crash
CTRL-W Nuke targeted ship
CTRL-ALT-W  Waste ALL ships in radar range
 
This one is in the manual, but no one seems to read it, so...
 
Press ALT-O at the flight screen for a cheating menu.  

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