Relics of Annorath is an upcoming MMORPG in Alpha-testing stage which takes place in a medieval/post-modern setting features a complex economic system.
It’s being developed by a Swiss company “Quantum Bytes” and uses the beautiful GNU/Linux friendly Unigine engine.
Even at this early stage of the development they provide a native GNU/Linux support (for the Alpha testers).
Sadly currently most of their website contains info in German with very little English (so maybe the Swiss/German readers could give us more info about the game as google translate is unable to translate https websites – so it seems).
The game is looking great at the Alpha stage but I assume that it would take some time till the open beta.
Also it seems that they are using the excellent foss program Blender for this game.