Cheat Codes:
Press [Ctrl] [Alt] ~ during game play in single player mode to display the console window. Type net_allowcheats 1 to enable cheat mode. Then, enter one of the following codes in the console window to activate the corresponding cheat:
CHEAT FUNCTION – CHEAT CODE
Additional ammunition – give ammo
Additional health – give health
Toggle unlimited health, must be re-entered after respawning – god
Toggle no clipping mode – noclip
Toggle maximum promotion – g_maxproficiency