While playing a game, press T for the "Talk" feature, then enter one of the following codes to activate the corresponding cheat
function:

Result - Cheat Code

     God mode - mpgod 
     Full ammo, armor, and health - mpkfa 
     Full health - mphealth 
     Full ammo - mpammo 
     Full armor - mparmor 
     Clipping mode - mpclip 
     Toggle coordinate display - mppos 
     Change camera angle - mpcamera 
     Change lighting - mplightscape