The First 3D MMORPG Meridian 59 Is Coming to Steam on August 28
MMORPGs in the world. Despite its age though, it does still have a handful of loyal players. The game is available for free and has been open source for some time. As-is the playerbase is quite tiny on the official servers, but a Steam launch may change that on the 28th.
The video below shows some guild PvP gameplay for those interested in seeing what the game looks like:
Prism of Life & Death
Further reading: Steam store page, Official Site