Various cheats
     Press \ and then type in the following code during gameplay:

Cheat code:             Effect: 
BLOODLUST               Weapon power up
FUSHIPI                 God mode
GUNS                    All weapons and ammo
TUNNEL                  Walk through walls
XMAS                    Gain all items
Full                    Version
AIMOVE                  Enemy AI toggle
AMOBJECT                Shows objects on automap
ARMS                    Gain all weapons and ammo
BLOAD                   Level warp
BLUB                    Slow-motion toggle
DIG                     Walk through walls
DUNHOUR                 Kill all enemies
FMK                     Gain full health
FRAME                   Display framerate
GIFT                    Gain all items
GOBBET                  Gib Yourself(?)
GPS                     Display location
GRAV                    Lower gravity level
GUNS                    Take away ammo
OREILLY                 Radar tracker
OUCH                    Hurt yourself
OVERDRIVE               Microchip powerup
POED                    Zero Gravity
RAGAMUFFIN              Invincibility toggle
SPUTNIK                 Full automap
VICI                    End level