After Riven was released, Robyn left Cyan to pursue other projects, and Cyan began developing Uru; developers Presto Studios and Ubisoft created Exile and Revelation before Cyan returned to complete the series with End of Ages. Myst and its sequels were critical and commercial successes, selling more than twelve million copies; the games drove sales of personal computers and CD-ROM drives as well as attracting casual gamers with its nonviolent, methodical gameplay. The video games' success has led to three published novels in addition to soundtracks, a comic series, and television and movie pitches.