To enable cheats, you need to modify the "freedom.ini" file in the game folder 
(create a backup copy of the file before proceeding). 
Open the file using Notepad and add the following line: 

EnableConsole 1 

Then, while playing press [~] to display the console window and enter one of the 
following codes to activate the corresponding cheat function: 

Cheats - Results
god 1 - God Mode 
giveall - All Weapons 
infammo - Unlimited Ammo 


Cheat mode (alternate):
Quickly enter one of the following codes during game play to activate the 
corresponding cheat function.

Effect - Code 
God mode - ioigod 
Flymo Ragdolls - ioiflymo  
Charisma - ioicharisma  
Unlimited ammunition - ioiammo  
Invisibility - ioiblind  
Fast motion - ioifastmo  
Slow motion - ioislowmo  
Shotgun - ioishotgun  
Rocket Launcher - ioirocket  
Hgun - ioihgun  
Sniper Rifle - ioisniper  
Rifle - ioirifle