[MP2]

Different callbacks handle returns differently. Some callbacks don't handle returns, such as OnPlayerSpawn - returning 0 in a FS won't stop it being called in a FS. For OnPlayerCommandText, return 1 signifies that the command has been processed in the FS and it won't be called in the GM.

One notable thing is that to use OnRconCommand in your gamemode, it must be used in a filterscript.