Just a simple cheat table. You can set infinite ammo for yourself and 0 ammo for the AI. The 0 ammo for AI currently sets the ammo for both allies and enemies. I'll see if I can come up with god mode and if I can find a way to separate allies from enemies.
EDIT: Table update. Added god mode.
How to use this cheat table?
Install Cheat Engine
Double-click the .CT file in order to open it.
Click the PC icon in Cheat Engine in order to select the game process.
Keep the list.
Activate the trainer options by checking boxes or setting values from 0 to 1