Riven is a puzzle adventure video game. It is the sequel to Myst and second in the Myst series of games. Developed by Cyan Worlds, it was initially published by Red Orb Entertainment, a division of Broderbund. Riven was distributed on five compact discs and released on October 31, 1997, in North America; it was later released on a single DVD-ROM on August 17, 1998, with improved audio and a fourteen-minute "making-of" video. In addition to the PC versions, Riven has been ported to several other platforms.