Riven is a puzzle adventure video game and the sequel to Myst. Developed by Cyan Worlds, it was initially published by Red Orb Entertainment, a division of Brøderbund. 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, with improved audio and a fourteen-minute "making-of" video. In addition to the PC versions, Riven has been ported to several other platforms, including the PlayStation, Sega Saturn, and most recently iOS-based devices.