Various Cheats
     Start the game with the command-line parameter -SPRUNKKNOWN
which is case-sensitive. Now, during gameplay, press any of the
following:

Alt + < or >            Play cockpit warnings and announcements
Alt + Up or Down        Send Herc 12 meters in that direction
Alt + Left or Right     Face Herc in that direction
Alt + Ctrl + N          Nukes enemy
Alt + Ctrl + S          View Herc textures
Ctrl + N                Select combat viewpoint 1
Alt + S                 Toggle AI
Alt + Keypad Plus       Advance 1 frame forward when AI disabled