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. The story of Riven is set after the events of Myst. Having been rescued from the efforts of his sons, the main non-player protagonist Atrus enlists the help of the player character to free his wife from his power-hungry father, Gehn. Unlike Myst, which took place on several worlds known as Ages linked together by special books, Riven takes place almost entirely on the Age of Riven, a world slowly falling apart due to Gehn's destructive rule. Development of Riven began soon after Myst became a success, and spanned more than three years. In an effort to create a visual style distinct from that of Myst, director Robyn Miller and his brother, producer Rand Miller recruited former Aladdin production designer Richard Vander Wende as a co-director. Broderbund employed a US$10 million advertising campaign to publicize the game's release. Riven was praised by reviewers, with the magazine Salon proclaiming that the game approaches the level of art. Critics positively noted the puzzles and immersive experience of the gameplay, though publications such as Edge felt that the nature of point-and-click gameplay limited the title heavily. The best-selling game of 1997, Riven sold 1.5 million copies in one year. After the game's release, Robyn Miller left Cyan to form his own development studio, ending the professional partnership of the two brothers. Rand stayed at Cyan and continued to work on Myst-related products including The Myst Reader and the real-time rendered game Uru: Ages Beyond Myst. The next entry in the Myst series, Myst III: Exile, was developed by Presto Studios and published by Ubisoft. A remake of the game is in development. Gameplay Like its predecessor, Riven is a point and click adventure game played from a first-person perspective. The player explores immersive environments depicted through a large series of computer generated stills using mouse clicks for movement or to manipulate objects within reach. By operating