American entrepreneur who established Cyan Worlds, a video game company that produced such popular games as Myst and Riven.
Some of his early video games include Spelunx and The Manhole.
He co-wrote several fiction books based on his popular Myst video game.
He co-founded Cyan Worlds with his brother, Robyn Miller.
He and Revolution Software founder Charles Cecil both had successful careers as video game designers and design company CEOs.