Press "T" during the game to bring up the command console, then type in the code and press "enter".

red5
Gives you all the weapons with full ammo.

jediwannabe on/off
Invul on/off

whiteflag on/off
Deactivates creatures

bactame
Heals player

wamprat
All items

eriamjh on/off
Fly mode on/off. Use jump and crouch keys to go up and down.

5858lvr
All map

If I made any mistakes, please email me. This page is under construction.