Doom 3 demo - Cheats?

[NeLi]

So I want to be able to check out the enemies, and their reactions better, but they tend to kill me before I can observe anything. I only have the demo, and I need the godmode cheat for it...

 

[RakuraiTenjin]

CNTRL ALT ~

god
give all
no clip (if you want it)

Those are the optimum things for just viewing scenery/models/AI