Original Thread for those who knows German:
https://forum.worldofplayers.de/forum/threads/1547669-Anleitung-Sacred-2-OpenNet-Multiplayer
Finally someone came up with the Idea of buying the OpenNet Server Domain and wrote an Lobby Server Script.
Supports Modded and Vanilla Clients!
How to Play:
1. Start your Game
2. Choose Multiplay
3. Create a New Account
-Choose Username
-Choose Password
-Choose any E-Mail (Please don´t use your real one the Admin don´t want your Information)
-Choose any Random CD-Key for example 1111-1111-1111-1111
Have Fun!!
He got the EU-Domain (eu.sacred2.net:6800) so I don´t know if your Game needs another Domain.