Rand Miller (born January 17, 1959 in Philadelphia, Pennsylvania, U.S.) co-founded Cyan (now Cyan Worlds) with brother Robyn Miller and became famous from the unexpected success of their computer game Myst, which remained the number one–selling game for the remainder of the 1990s. Rand also worked on the game's sequel, Riven, and later Myst III: Exile, Myst IV: Revelation, Myst V: End of Ages, realMyst, and Uru. The brothers also acted out parts in the game, with Robyn as Sirrus and Rand as Achenar and Atrus.