Myst Online: Uru Live is a massively multiplayer online game developed by Cyan Worlds and spinoff game in the Myst video game franchise. Although Uru and the Myst series share the theme of the D'ni civilization and culture, Uru takes place in the present day, as if the entire story of the Myst saga were discovered to be true. Unlike previous games where the player character's history, physical appearance, etc. are omitted, Uru allows avatar customization so that "you are you". The gameplay is more sophisticated than in previous Myst games, and the graphics are in real-time 3D (as they are in realMyst) rather than being pre-rendered stills.
Cyan Worlds, Inc. has put most of the program code sources for Myst Online: Uru Live into open source. This includes the code for the client, tools and python scripts. With these sources you can find out how MOUL ticks. And with the MOSS server, fans can set up and run Myst Online: Uru Live on their own servers, in addition to the Cyan Worlds Myst Online: Uru Live servers.
The 3D models and textures that were used to create Myst Online: Uru Live will not be part of the open source license. We will probably release some of these models and textures, but under a different license than the code source.
The grand hope is that you fan developers will create fixes, improvements, new Ages and new game play, that will keep Uru alive. Thanks!
There are (at least) two places where you can view, get, collaborate and explore the released open sources and it's branches: