How can you make the cheat console work in QUAKE 3
How can you make the cheat console work in QUAKE 3
The best way is to activate cheats in the console, is by putting in /sv_cheats 0, this should then make the cheats work. There are any number of cheats and so it is recommended noting them down.
What else that might be useful is that it does not allow cheats in multiplayer.