Legend of Crystania (レジェンド・オブ・クリスタニア, Rejendo obu Kurisutania) is a Japanese media franchise of RPGs, novels, anime and manga by Ryo Mizuno and Group SNE. The novels by Mizuno and others were published from 1993 to 2002, based on Mizuno's RPG "replays" serialized in the Japanese magazines Comptiq and later in Dengeki-Oh from November 1989 to January 1998 issues.

A full-length Japanese animated motion picture Legend of Crystania: The Motion Picture (はじまりの冒険者たち レジェンド・オブ・クリスタニア, Hajimari no Bōkenshatachi: Rejendo obu Kurisutania, The First Adventurers: Legend of Crystania) (screened as a double feature together with Slayers The Motion Picture), a three-volume manga illustrated by Akira Himekawa, and a video game for PC 98, Crystania: Legend of the Gods’ King (神王伝説クリスタニア, Shin'ō Densetsu Crystania), were released in 1995. Radio drama (later re-released as Drama CD) adapting the same story was released earlier in 1993. Tabletop RPG materials were also released. The film was released on VHS on September 22, 1998 and on DVD on February 8, 2000 in North America by ADV Films.

The film's sequel, the three-part original video animation (OVA) series Legend of Crystania: The Chaos Ring, was released in 1996. These episodes were released on VHS on November 11, 1998 and on DVD on March 19, 2002 in North America by ADV Films.