Cheat mode:
Enable the console window in the game options. Then, press ~ and enter one of the following codes at the console window to activate the corresponding cheat function.

Get all weapons	wuss
Toggle god mode	god
Toggle no clip	noclip
All weapons	give all
Spawn indicated item	give <item name>
Set health level	health <1-100>
First person view	cg_cameradist -45
Return to default view	cg_cameradist 128
Level select	map <map name>
Toggle frame rate display	fps <0 or 1>
Disable enemy AI	notarget

Map names:
Use one of the following entries with the map code.

centipede1
centipede2
facade
fortress1
fortress2
funhouse
garden1
garden2
garden3
garden4
grounds1
grounds2
gvillage
hedge1
hedge2
hedge3
jlair1
jlair2
keep
pandemonium
potears1
potears2
potears3
qlair
rchess
skool1
skool2
tower1
tower2
tower3
utemple
wchess1
wchess2

Item names:

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 (Use multiple times to get all three Demon Dice)
w_ragebox.tik