Translating to demon compendium, this Sega Saturn disc is supplementary content to Shin Megami Tensei: Devil Summoner, releasing a few months after the game on April 26th, 1996. It was later packaged in a bundle with the original game in the Special Box re-release. It allows the player to view artwork of Devil Summoner's 255 demons and read about their stats and backstory while listening to music.