Use a text editor such as Notepad to edit the "weapons.god" file in the game folder. The ammunition count and other settings can now be altered. Edit the "armour.god" file in the same folder to get better armor.
God Mode and Fly Mode
While playing in the game, press ~ to display the console window. Type "login developer"(minus quotes) to enable cheat mode.
Type one of the following codes and press [enter]
to activate the cheat function.
GOD MODE....god 1
to disable god mode, enter god 0
FLY MODE.... fly 1
to disable fly mode, enter fly 0