PCCheats
Deus Ex

Walkthroughs and Guides
Outside link to all the information you'll need on this game, and more!
Courtesy of: Gamefaqs.com

PASSCODE CHEATS

HOW TO ENTER THE CODES
Follow the steps below..
1. Edit the User.ini file so that a open letter is bound to "talk". 
2. While in game, hit the Talk key, delete "Say", and then type:
set DeusEx.JCDentonMale bCheatsEnabled True
You can now enter the following codes:

Effect .... Code
God mode .... god
Get All weapons .... allweapons
Ammo refill .... allammo
skill points up.... allskillpoints
Basic Augmentations .... allaugs
Refill Health .... allheath
Refill Energy .... allenergy
1000 extra credits .... allcredits
Unlock all images .... allimages
Spawn a large group of enemies .... spawnmass
Unlock door .... opensesame
Special Menu .... legend
Kill enemy .... tantalus