Go to the options menu in the game and turn on the console mode. During gameplay bring up the console ~ and put in one of the following codes

wuss - Get all weapons

health 100 - Max out health

notarget - Be invisible

god - Invincibility

noclip - No clipping mode

fps 0 or fps 1 - Toggle frame rate display

give all - Get Weapons & ammo

cg_cameradist -45 - Get Close view

cg_cameradist 128 - Regular view

map - Substitute a map name below for to go to that map

centipede1
centipede2
facade
fortress1
fortress2
funhouse
garden1
garden2
g arden3
garden4
grounds1
grounds2
gvillage
hedge1
hedge2
hedge3
jlair1
jlair2
kee p
pandemonium
potears1
potears2
potears3
qlair
rchess
skool1
skool2
tower1
tower 2
tower3
utemple
wchess1
wchess2
wforest

give - Get item use list below

w_knife.tik
w_cards.tik
w_mallet.tik
w_jackbomb.tik
w_eyestaff.tik
w_icewand .tik
w_jacks.tik
w_blunderbuss.tik
w_demondice.tik (note: This command or give all must be used multiple times to get all three Demon Dice)
w_ragebox.tik