While playing, press ~ to open the console, then type any of the following codes:

CODERESULT
g_fly 1 Fly Mode On
fly Fly Mode
gotoroom room## Select Room ##
cl_showinfo 1 Show FPS
g_noclip 1 No Clipping Mode
game_godmode ## God Mode (## = Current Health)
addwpn ? List Weapons
addwpn ## Add Weapon ## (from List)
suicide Kill Self
map ## Load Map ##


U.S. Version Cheat Codes
The following codes work with the U.S. retail version of the game.

g_debugcmdproc_flag
g_sptimer
g_autosave
g_stickyclient
g_dontrewriteconfig
g_developer
g_printgroundnormal
g_loadmap
g_spectarors_only
g_noclip 1 - go throu walls
g_fly 1 - fly mode on
g_fly 0 - fly mode off
g_userconfig
g_writedemotofig
g_superman
g_configname
g_paused
game_godmode 100 - gives health to 100
game_godmode 0 - god mode off
game_levelresult
gotoroom room01 - goto room01 room02 etc..
w_showaxis
w_lodend
w_lodstart
w_nolod
snd_on
changemode
say
shutdown
ping_servers
connect
cl_showinfo 1 - FPS on
cl_showinfo 0 - FPS off
begin
loadall
detchbaselines
fetchsound
fetcjmodel
fetchdata
fetchvars
fly - you fly
disconnect
disconnect_this_client
new
svmap
load
save
suicide
nextmap
net_stats_reset
net_stats
maintenance_pwd
changemode
map - (mapname)
demo_stop
demo_play
demo_record
demo_record_stop
show_sounds
strictalias
delayqueue
dumpvars
hitpoints 10000
sbind
delvar
addvar
addwpn ? - gives weapon list
addwpn . - where . is add weapon number
unbindall
print
exit
list
set