Cheat mode:
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "freedom.ini" file in the game folder. Add the following line in the file.

EnableConsole
Begin game play, then press ~ to display the console window. Enter one of the following codes at the console :

Result - Code:
God mode - god 1
All weapons - giveall
Unlimited ammunition - infammo

Cheat mode (alternate):
Quickly Use one of the follow codes during Gameplay:.

Result - 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

Bonus level:
Successfully complete the game to unlock the Liberty Island level.