This game was designed at Nintendo's Research and Development 1 (R&D1) division, while the programming was handled by the external company Intelligent Systems (known as Myth of Light: The Mirror of Palutena at the time). The game was developed for the Family Computer Disk System (FDS) because the peripheral's Disk Card media allowed for three times the storage capacity of the Family Computer's (and NES's) console's cartridges. Combined with the possibility to store the players' progress, the floppy disk format enabled the developers to create a longer game with a more extensive game world. Myth of Light: The Mirror of Palutena was Toru Osawa's debut as a video game designer, and he was the only staff member working on the game at the beginning of the project. Osawa (credited in the U. S. version as Inusawa) intended to make Light Myth: Palutena's Mirror an action game with role-playing elements, and wrote a story rooted in Greek mythology, which he had always been fond of. He drew the pixel art, and wrote the technical specifications, which were the basis for the playable prototype that was programmed by Intelligent Systems. After Nintendo's action-adventure Metroid had been finished, more staff members were allotted to the development of Myth of Light: The Mirror of Palutena.