Ultima Online

The world Sorsaria is sits at the center of its system. Two moons orbit around it called Trammel and Felucca.  The other planets are named after the 8 virtues; Honesty, Compasison, Valor, Justice, Sacrifice, Honor, Spirituality, and Humility, orbit around Sorsaria diagonally. The Sun is in a fixed position as well. It is believed when the Gem of Immortality fractured it froze Sorsaria implace and cause the other worlds to orbit around it.

In ancient time, Sorsaria was overun by demons of all sorts, but banish by a group of beings known only as "Ancient Ones". These Ancient Ones ascended to other realms or chose to become mortal. Unfortunately though a mortal wizard by the name of Zog destroyed most of the world. Some people theorize, the demons were actually the race of Gargoyles, and the Ancient Ones could be the Elves. Centuries later though life survived and people began to live in those lands and found eight kingdoms. However, a young wizard by the name of Mondain wanted to rule Sorsaria and murdered his father for the Sun Ruby Gem. He turned this powerful artifact into the Gem of Immortality. Years later he would be defeated at the hands of the Stranger and his companions. Yet when the gem was destroyed it fractured reality into several facets, a mirror of the worlds as it was and it would be and what is should be. 

Most of reality was stable, travel to the other kingdoms was difficult but not impossible. The world had changed in so many subtle ways that people easily became lost. However most managed to survive on Britania, where the Stranger had made his home and helped establish his new kingdom. .Others went in search for the other four continents. The Kingdoms of the White Dragon and Shamino thought lost, were found and renamed the Serpent Isles. The Kingdom of the Black Dragon and Olympus was taken over the forces of the Guardian and the Titans. The Kingdoms of Rondorlin and Barataria were destroyed completely, however a groups of Japanese from the Feudal Era found there where here.
Yet peace would be threatened time and time again from Mondain's legacy. First by his apprentice Minax, and then by his creation Exodus. Even afterward Mondain still managed to menace Sorsaria since the Guardian was part of of his legacy and had already conquered Morgaelin. It wasn't until the Avatar and the Guardian finally battled each other, that peace was finally restored to the land.

Individuals know have become aware of the lost continents and also aware of the fractured reality. They are doing there best to travel out the world to restore the Gem of Immortality to the Sun Ruby. Yet in order to do that they must uncover many secrets.

As of to date there is no PnP RPG conversion.