mechanical contraptions and deciphering codes and symbols discovered in the surroundings, the vaguely explained goal can eventually be reached. To navigate the world, the player clicks in the direction they want to walk or turn. The cursor changes in appearance, depending on its position on the screen and what it is hovering over, to show what effect clicking will have. For instance, if the player positions the cursor hand near the side of the screen, it may show a pointing finger, indicating that clicking will turn the view in that direction. The cursor changes in context to show when players can drag or toggle switches, or when certain items can be picked up and carried. Such items can then be examined at any time, and either reveal clues to puzzles or provide information on the game's setting and story. Like Myst, Riven has an optional method of navigation known as Zip Mode, which allows players to skip to areas already explored, but may cause them to miss important clues. Riven has more complex and numerous puzzles than its forerunner and is set in a larger virtual world for players to explore. Whereas in Myst the objective of the game is to travel to different Ages to solve puzzles before returning to a "hub Age", Rivens gameplay takes place on the five islands of the Age of Riven. Much of it consists of solving puzzles to access new areas of the islands, though players are also able to explore without fulfilling objectives. The volcanic landscape depicted, with its steep cliffs and crater lakes, is bestrewn with mechanical, Victorian-style artifacts such as elevators, pipes, levers and roller coaster-like transports. To solve the game, players must consider the purpose and physical principles of these artifacts as well as their role in the fictional culture. Plot Rivens story continues where Myst and its companion novel, The Book of Atrus, left off. The player assumes the role of the Stranger, the protagonist of the first game and friend of Atrus (Rand Miller). Atrus knows the ancient art of creating "linking books", specially written books that serve as portals to other worlds known as "Ages". Atrus needs the Stranger's help to free his wife, Catherine (Sheila Goold; voice by Rengin Altay), who is held hostage in her home Age of Riven, which is slowly collapsing. Her captor is Gehn (John Keston), Atrus' manipulative father and self-declared