How can I connect to MariusNet with Myth III?
First upgrade to the latest version of Myth III (1.3.1 at the time of this writing). Next, download this Metaserver file for Myth III and place it in your Myth III preferences/ folder (backup your old one first). The interface on the login screen where you put in your username/password will still say PlayMyth untill/unless a plugin is made that replaces it, but you most definitely will log into Mariusnet with it. It is easily verified by just reading the Blue Bar message upon login. To revert to PlayMyth, just delete the file and let the game write a new one, or copy back the one you backed up.