Various Cheats
     Start  the  game  with the command line parameter +set console 1.
Then  during  gameplay,  enter  any  of  the  following "Codes" at the
console (~):

Code                    Effect 
heretic                 God Mode 
phantom                 No Clipping 
ninja                   Enemies Don't See You 
bigelbow                All Weapons 
matrix #                Timescale (1-10) 
gimme x (below)         Spawn Object/Item x 
updateinvfinal          More Ammo 
killallmonsters         Kill All Enemies 
map x                   Goto Map x (below) 
kill                    ??? 
putaway                 ??? 
destroyents             ??? 

Level Names
trs1 
trn1 
arm1 
kos1 
kos2 
kos3 
sib1 
sib2 
sib3
irq1a 
irq1b 
irq2a 
irq2b 
irq3a 
irq3b 
ger1 
ger2 
ger3 
ger4
nyc1
nyc2
nyc3
sud1
sud2
sud3
jpn1
jpn2
jpn3

Spawning Objects
     Type  DEVELOPER  1  in the console first. Then type ENTLIST which
will list all the items that are spawnable. Now type the GIMME code to
spawn the item.