 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 . 
