The development began following the commercial success of
Fire Emblem: Shadow Dragon and the Blade of Light in 1990. The original game's designer and writer
Shouzou Kaga returned to those roles and also became director. The music and sound design was handled by
Yuka Tsujiyoko, who had worked on the first
Fire Emblem. The game's subtitle, "''''", is a Japanese term for a side story related to a larger work, denoting the game's status as a secondary adventure set in the same timeline as the first game. Kaga designed
Gaiden to address issues raised with the first game, such as tedious elements of map navigation. The system of
Shadow Dragon and the Blade of Light was used as the base for various improvements to aspects such as enemy AI, although the gameplay adjustments ended up removing some of the strategic elements. The game made use of the new
MMC4 memory chip, developed partially in response to the memory capacity problems faced during the development of the first game. For the story, Kaga wanted to deepen the relationship between the player and their units, represented through the growth of the characters through their battles. To create a stronger and broader central narrative, Kaga created the game's dual protagonists Alm and Celica.
Gaiden was released on the
Famicom on March 14, 1992. It released on a 2Mbit cartridge. It was the second and last game in the series to be developed for the system, and has never received an official release outside Japan. the version for the
Nintendo 3DS on April 3, 2013, and the version for the
Wii U on August 20, 2014. ==Reception and legacy==