Cheat Codes
The first thing that must be done is to enable the "Console" window in the Game Options screen under the Settings choice. Now while playing the game hit ~ to bring up the console and enter any of the follwoing codes:
God Mode = god
All Weapons+full Ammo = give all
Set Health = health [1-100]
All Weapons = wuss
Play from First Person View = cg_cameradist -45
Deactivate enemy AI = notarget
No Clipping Mode = noclip
Level Select = map [map name]