Myst is a franchise centered on a series of adventure video games. The first game in the series, Myst, was released in 1993 by brothers Rand and Robyn Miller and their video game company Cyan, Inc. The first sequel to Myst, Riven, was released in 1997 and was followed by three more direct sequels: Myst III: Exile in 2001, Myst IV: Revelation in 2004, and Myst V: End of Ages in 2005. A spinoff featuring a multiplayer component, Uru: Ages Beyond Myst, was released in 2003 and followed by two expansion packs.

Myst's story concerns an explorer named Atrus who has the ability to write books that serve as links to other worlds, known as Ages. This practice of creating linking books was developed by an ancient civilization known as the D'ni, whose society crumbled after being ravaged by disease. The player takes the role of an unnamed person referred to as the Stranger and assists Atrus by traveling to other Ages and solving puzzles. Over the course of the series, Atrus writes a new Age for the D'ni survivors to live on, and players of the games set the course the civilization will follow.

The brothers developed Myst after producing award-winning games for children. Drawing on childhood stories, the brothers spent months designing the Ages players would investigate. The name Myst came from Jules Verne's novel The Mysterious Island. After Riven was released, Robyn left Cyan to pursue other projects, and Cyan began developing Uru; developers Presto Studios and Ubisoft created Exile and Revelation before Cyan returned to complete the series with End of Ages. Myst and its sequels were critical and commercial successes, selling more than twelve million copies; the games drove sales of personal computers and CD-ROM drives as well as attracting casual gamers with its nonviolent, methodical gameplay. The video games' success has led to three published novels in addition to soundtracks, a comic series, and television and movie pitches.

Myst's story begins with the arrival of a people known as the D'ni on Earth, almost 10,000 years ago. The D'ni /dəˈniː/ are an ancient race who used a special skill to create magical books that serve as portals to the worlds they describe, known as Ages. The D'ni build a great city and thriving civilization in caverns. A young geologist from the surface, Anna, stumbled upon the D'ni civilization. Learning the D'ni language, Anna becomes known as Ti'ana and marries a D'ni named Aitrus; the couple have a son named Gehn. Soon after, D'ni is ravaged by a plague created by a man named A'Gaeris. Aitrus sacrifices himself to save his wife and child, killing A'Gaeris while Ti'ana and Gehn escape to the surface as the D'ni civilization falls.

Ti'ana raises Gehn until he runs away as a teenager, learning the D'ni Art of writing descriptive books. Ti'ana also cares for Gehn's son, Atrus, until Gehn arrives to teach Atrus the Art. Atrus realizes that his father is reckless and power-hungry, and with the help of Ti'ana and a young woman, Catherine, Atrus traps Gehn on his Age of Riven with no linking books. Atrus and Catherine marry and have two children, Sirrus and Achenar. The brothers grow greedy, and, after plundering their father's Ages, they trap Catherine on Riven. When Atrus returns to investigate, the brothers strand him in a D'ni cavern before they themselves are trapped by special "prison" books. Through the help of a Stranger, Atrus is freed and sends his benefactor to Riven to retrieve Catherine from the clutches of Gehn. Sirrus and Achenar are punished for their crimes by being imprisoned in separate Ages until they reform.

Atrus writes a new Age called Releeshahn for the D'ni survivors to rebuild their civilization as he and Catherine settle back on Earth, raising a daughter named Yeesha. As Atrus prepares to take the Stranger to Releeshahn, a mysterious man named Saavedro appears and steals the Releeshahn Descriptive Book. The Stranger follows Saavedro through several Ages (which were used to train Sirrus and Achenar in the art of writing Ages) before finally recovering the book. Ten years later, Atrus asks for the Stranger's help in determining if his sons have repented after their lengthy imprisonment; the Stranger saves Yeesha from Sirrus's machinations, but Sirrus and a repentant Achenar are killed. D'ni is not fully restored until the creatures the D'ni enslaved, known as the Bahro, are freed.

Myst was originally conceptualized by brothers Rand and Robyn Miller. The Millers had created fictional worlds and stories as young children, influenced by the works of authors such as J. R. R. Tolkien, Robert A. Heinlein, and Isaac Asimov. They formed a video game company together called Cyan, Inc.; their first game, called The Manhole, won the Software Publishers Association award in 1988 for best use of the digital medium. Cyan produced other games, aimed at children; the Millers eventually decided their next project would be made for adults.

The brothers spent months designing the Ages comprising the game, which were influenced by earlier whimsical "worlds" Cyan had made for children's games. The game's name, as well as the overall solitary and mysterious atmosphere of the island, was inspired by the book The Mysterious Island by Jules Verne. Robyn's unfinished novel, Dunnyhut, influenced aspects of Myst's story, which was developed bit by bit as the brothers conceptualized the various worlds. As development progressed, the Millers realized that they would need to have even more story and history than would be revealed in the game itself. Realizing that fans would enjoy getting a deeper look at the story not in the games, the Millers produced a rough draft of what would become a novel, Myst: The Book of Atrus.