Shin Megami Tensei: Digital Devil Saga, known in Japan as Digital Devil Saga: Avatar Tuner, is a spin-off of the Megami Tensei series for the PlayStation 2. The game is an evolution from Shin Megami Tensei III: Nocturne. Despite sharing the same engine, graphics, and assets, many of the gameplay elements have been changed to conform to the style of having story relevant only party members. Additionally, Digital Devil Saga brings back demons that were absent from Shin Megami Tensei III: Nocturne. Outside Japan, the game was released with the Shin Megami Tensei brand, despite it not actually being a Shin Megami Tensei game.