Various cheats
     While  playing a game, press tilde ~ to run console and enter one
of the following codes to activate the corresponding cheat function:

Cheat code:                  Effect:
fps_max [number]             Change framerate
lightgamma [number]          Change brightness
stopsound                    Disable background sound
MP# player                   mp3
[Space]cl_dynamic_xhair 0    Disable crosshair change 	
cl_dynamic_xhair 0           No crosshair