Various Cheats
     You   must  start  the  game  with  the  -drake  -strega  -amitab
-fuzzyhead  -mice  command line parameters. An quick way to do this is
to  right-click  on  the desktop shortcut, select 'Properties' and add
these  to  the 'Target' field. Then type in the following codes during
gameplay.

Cheat code:   Effect:
F8            Invisibility
F10           Automatic mission completion
F11           Manual mission completion
F7            God Mode
F12           Fail mission