Quake/Cheats

Protected cheats
The cheat codes that give you an advantage are locked down by the server. They can only be used in single-player mode, and will not function if deathmatch or coop are active.

Unprotected cheates
Some cheats can be used at any time, even on remote servers. While some servers are modded to lock down these cheats, most do not.

These cheats can be obtained simply by scanning the Quake source code, and with the availability of the source code, aren't exclusive.

Some of these cheats might not function unless you are hosting the Quake server or are playing in single-player mode.