Start the game with the "+set developer 1" command line parameter. After the game starts, if you get a blank screen with console, press ~ to close the console and press [Esc] to return to the main menu. While playing a game, press ~ to display the console window, then enter one of the following codes to activate the corresponding cheat function:
Result
Cheat Code
Invincibility and infinite ammunition god
No clipping mode; press [Jump] to move up, [Crouch] to move down noclip
Spawns model. You must give the full path to the model spawn [model and path]
List the models modellist
Invisible to enemies (untargetable) notarget
Set health to indicated number health [number]
Toggle third person view cg_3rd_person [0 or 1]
Commit suicide kill