Various Cheats
     During  gameplay,  press ~ for the console window. Then enter any
of the following "Codes":

Code                    Effect
give all                All Weapons and Items 
give ammo               All Weapons 
give jetpack            Jet Pack 
give forcefield         Force Field 
give life               Extra Life 
toggle r_timings        ??? 
toggle r_stats          Game Stats 
toggle g_debug          Debug Mode 
camera camera           Ability to Search Whole Map 
camera player           Normal Camera 
kill                    Suicide 
toggle g_p_god          God Mode 
pause                   Matrix-Style Pause 
toggle g_map_info       Map Info 
give keys               Get All Keys