High Quality Content by WIKIPEDIA articles! Myst Online: Uru Live is an open source massively multiplayer online adventure game developed by Cyan Worlds. The game is the multiplayer component to the 2003 video game Uru: Ages Beyond Myst. Like Uru, Myst Online takes place in 2000`s New Mexico, where an ancient civilization known as the D`ni once thrived. The D`ni had the ability to create portals to other worlds or Ages by writing descriptive books of the Age. Players uncover clues and solve puzzles together; plot developments were added via episodic content updates.