Cheat Codes:
Start the game with the “-console” command line parameter. Press ~ to display the console window, then enter sv_cheats 1 before loading a game or level to enable cheat mode. Enter one of the following codes at the console window to activate the corresponding cheat function:
CHEAT FUNCTION – CHEAT CODE
God mode – god
No clipping mode – noclip
All weapons – impulse 101
Set gravity; 800 is default – sv_gravity