Megami Tensei Gaiden: Last Bible, or just Last Bible, is a series in the Megami Tensei franchise and a "side-story" or spin-off of Digital Devil Story: Megami Tensei.[a] Its first game released for the Game Boy in late 1992. Differing from other Megami Tensei games, Last Bible features a fantasy setting and simplified role-playing elements, in contrast to the franchise's more modern or cyberpunk settings and intricate gameplay.
Last Bible was one of the first Megami Tensei games to see release outside of Japan. Only the first game in the series was released in North America, where it was titled Revelations: The Demon Slayer.