Dragon Slayer (ドラゴンスレイヤー, Doragon Sureiyā) is an action role-playing game,[2][3] developed by Nihon Falcom and designed by Yoshio Kiya.

[6] It was followed by an MSX port published by Square in 1985 (making it one of the first titles to be published by Square),[7] a Super Cassette Vision by Epoch in 1986 and a Game Boy port by the same company in 1990 under the name Dragon Slayer I (ドラゴンスレイヤーI, Doragon Sureiyā Wan).

It also includes Dragon Slayer: The Legend of Heroes, which would later spawn over a dozen entries across multiple subseries.

[2] Building on the prototypical action role-playing elements of Panorama Toh (1983), created by Yoshio Kiya and Nihon Falcom,[10] as well as Namco's The Tower of Druaga (1984),[11] Dragon Slayer is often considered the first Japanese action role-playing game.

[6] Along with its competitor, Hydlide, Dragon Slayer laid the foundations for the action RPG genre, including franchises such as Ys and The Legend of Zelda.