Note: The following codes may only be enabled in single player mode.
Press ` to display the console, then enter iamtheone to enable cheat
mode. Then, enter one of the following codes at the console to
activate the corresponding cheat function.
God mode god
All weapons loaded
Flight mode fly
No clipping mode ghost
Disable flight and no clipping walk
Add indicated number of bots addbots
Advance to indicated map open