Duke Nukem: Manhattan Project

Go to console (open the console by pressing the "~" key) then type exec cheats.cfg -then hit Enter and close console (Hit the "~" key to close the console). G - gives everything except jetpack and force field H - gives all ammo J - gives jetpack F - gives force field L - gives extra-life K - kills self I - turns invincibility ON/OFF P - developer's pause ("Matrix" mode) - - small HUD = - normal HUD M - shows map name you are on