Cheat Codes
http://www.bayserve.net/~mike/sw/cheats.html

Press 'T' and then enter the code.
SWCHAN	Toggle god mode
SWGIMME	Gives you all items
SWGREED	Enable every cheat
SWTREKxy	Warp to level (x=episode [0=first], y=level [1 = first])
SWLOC	Use once, show framerate. Use again, show location in level.
SWRES	Change resolution
SWSTART	Restart level
SWGHOST	Toggle clipping mode
SWMAP	Toggle automap
CONFIG	Displays "help config" (?)
QUIT	Quits
CLEAR	Appears to do nothing (?)
SWTRIX	Turn on Bunny Rockets w/ Rocket launcher (#5)
SWNAME	In a multiplayer game, it changes your name.
DUMPSOUNDS	Says "dumped sounds to dbg.foo" and creates that file
SOUND	Plays sound file 0-999.
SWWAVE	Appears to do nothing (?)
WINPACHINKO  	Lets u win the pachinko game and get an item
Text-only listing of cheat codes



Here's another way to cheat:
Edit the sw.cfg (shadow warrior configuration) file. On the second to the last line of the sw.cfg file, you see this:


Kiwi = 0
Changing the value from 0 to 700 will allow you to kill enemies with one hit.