Shadowmaster

At the main menu, press F2 + F3. You should see
the message “Cheats On”. Now hold + and press
BackSpace for a Cheat Code prompt.
SCOUSER           - Enable playtester keys
TURBO           - Turbo mode
EVERY LEVEL SAVE     - Can save after every level
ALLOW SINGLE       - Single player on multi-level
PAPARAZZI         - Press Insert to save a Screenshot
                (in C:TEMPPIX)
THE WHOLE OF CREATION - All cheats off
       
Playtester keys:
       
Shift-F9 - Skip level
F11     - Ammo cheat
F12     - Health cheat