A book entitled The World of The Dark Crystal, written and illustrated by Brian Froud, was released at the same time as the film. The book, written as the annotated translation of the Book of Aughra by fictional Oxford professor "J.J. Llewellyn", expands greatly on the world of "Thra", detailing its conditions and history, as well as providing some additional story background.
An illustrated children's storybook version, The Tale of the Dark Crystal, written by Donna Bass and illustrated by Bruce McNally.
A board game called The Dark Crystal Game was also released in 1982 by Milton Bradley.
A book-and-cassette adaptation was released in 1983 by Disneyland Records as part of its Read-Along Adventures series.
In 1983, a graphic adventure based on the film was released for the Apple II and Atari 8-bit computers.
Marvel Comics published a comic book adaptation of the film by writer David Anthony Kraft and artists Bret Blevins, Vince Colletta, Rick Bryant, and Richard Howell in Marvel Super Special #24.
Vogue commissioned six of the film's costume designers to fashion clothes based on the characters of the film.
Music duo The Crystal Method used samples from the film in the song "Trip Like I Do", released on their 1997 album Vegas.
In February 2011, Sandstorm Productions – a firm that partnered with various design studios to facilitate the development and distribution of board games and collectible card games – revealed that it had acquired the license to produce games based on various Henson properties, including The Dark Crystal. Before any definitive plans were made, however, Sandstorm went out of business in June 2012.
Archaia announced plans for a role-playing game based on The Dark Crystal at the August 2011 Gen Con gaming convention, intending to publish it later the following year. Like its Origins Award-winning Mouse Guard game, The Dark Crystal was to be designed by Luke Crane and use mechanics similar to that of The Burning Wheel, but it was not released.
In August 2013, Black Phoenix Alchemy Lab - a company that produces body and household blends with a dark, romantic Gothic tone - debuted the first of their licensed The Dark Crystal perfumes. The debut included four Skeksis blends: skekUng the Garthim-Master, skekNa the Slave-Master, skekTek the Scientist and skekZok the Ritual-Master.
In the Jim Henson's Creature Shop Challenge episode "Return of the Skeksis", the competing creature designers had to work in teams of three to build a Skeksis that has been banished to different parts of Thra and has been called back to the Skeksis Castle.
The song "Return to Oz" by the band Scissor Sisters on the album Scissor Sisters (2004) features a reference to the film's antagonists the Skeksis: The Skeksis at the rave meant to hide deep inside their sunken faces and their wild, rolling eyes, But their callous words reveal that they can no longer feel.
The song "Skeksis" on the album Alien by Canadian band Strapping Young Lad is named after the film's antagonists; the song itself contains an interpolation of the film's theme melody. Singer-songwriter Devin Townsend would later base Ziltoid the Omniscient on the characters from the film.
Dark Crystal Tales by Cory Godbey, a children's book of short stories, was released in August 2017.
A book entitled The Dark Crystal: Age of Resistance: Inside the Epic Return to Thra was released in November 2019, two months after the Netflix series premiered. It details the making of the series and features concept art, interviews, set photography, and more.
In October 2020, a guide to the characters and creatures from the Dark Crystal universe called The Dark Crystal Bestiary: The Definitive Guide to the Creatures of Thra was released.
In January 2021, the River Horse company has announced that it is developing a role-playing game set in the world of both the original film and the Netflix prequel series called The Dark Crystal Adventure Game that was released in November 2024.
In March 2021, it was announced that the Royal Opera House will adapt the film into a ballet entitled The Dark Crystal: Odyssey. It was directed and choreographed by Wayne McGregor with music by Joel Cadbury and is described as a "coming-of-age story" for family audiences. It ran from May 13 to June 4, 2023, under the name UniVerse: A Dark Crystal Odyssey.
In the video game Lost Records: Bloom and Rage, a tape of the movie can be found in the character Swann’s room.
