Hold down F1 while playing the game and type...

mukor	God mode
qsave	Quick Save
pause	Pause the game
frame	Screen Shot
golrg	Makes you real big ( try typing this a lot ! )
btiny	Shrinks You
tough	Difficulty Level
mecam	1st Person View
gocam	Stationary Cam
spcam	Enemy Cam
bamff	Sends you to the end level
gamma	Changes Gamma Level
dedly	Weapon Enhancer
sepku	Kills you
Fun
bills	Bill's demo type thing
ifall	Knocks you off you feet!!
hicup	Throws you around!!
silky	Stupid Monsters
lunar	Low Gravity
funky	Funky keys toggle
catch	Out of World Trapping Toggle
aiaim	Ai toggle
agrav	Limb gravity
Debug
bzone	WireFrame/Shading/Nothing/Normal
fpers	Shows "Sound Cache Misses"
goura	Gourad shading
ntrud