Various cheats
     During  play,  press  Enter  to display the chat box and type the
following. The asterisk (*) is part of the code:

Cheat code:             Effect:
*cheat                  God mode and unlimited ammo
*fps                    Displays frame rate
*ghost                  No clipping mode
*maxfps                 Changes maximum frames per second to 30 or 60
*other                  Toggles AI
*state                  AI status
*suicide                Kill yourself