Doom 3 Codes -

Cheat mode (alpha version):
Enter one of the following codes to activate the corresponding cheat function.

Effect	Code
God mode	god
Disable AI (non-functioning)	notarget
No clipping mode	noclip
Machine gun	give weapon_machinegun
Shotgun	give weapon_shotgun
Plasma gun	give weapon_plasmagun
BFG	give weapon_bfg
Chainsaw	give weapon_chainsaw
Rocket launcher	give weapon_rocketlauncher