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Quantum Devil Saga: Avatar Tuner

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Quantum Avatar Turner English cover

The English cover of the first volume

Quantum Devil Saga: Avatar Tuner (クォンタムデビルサーガ アバタールチューナー) is a five-volume series of novels set in the world of Digital Devil Saga. Authored by Yu Godai, the original story writer of the games who had to leave the project due to health issues, they explore the events of the games differently and diverge from them.

The series originally was published in Japan starting in February 2011. The first volume's English release, translated by Kevin Frane, was released on July 31st, 2014, by publisher Bento Books. He has confirmed he is currently working on the second volume.



Six tribes battle in the post-apocalyptic Junkyard, a grim world of demons and evil powers that block entrance to the promised land, Nirvana.

Comparison with the original gameEdit

  • The circumstances before Serph assumes the leader of his tribe, Embryon, is told in the flashbacks.
  • Serph is shown talking instead of being a silent protagonist. Many dialogues of Gale in the game are instead spoken by Serph in the novel.
    • Serph is depicted as a caring and compassionate leader. He is also shown to be a pacifist unless hostility is the only option.
  • Gale, as well as the other few remaining bishops in the Junkyard, is explained to be wearing the hood for protecting the many implants and sockets behind his brain. In a similar fashion as in Ghost in the Shell, he is shown using a cable to connect his brain with a displaying device to replay his visual and audio memory for his cohorts.
  • The awakening of human egos after the denizens of the Junkyard receive their Atmas develops much quicker than in the game. The only exception is the bishop type denizens like Gale who require themselves totally void of emotion for their role.
  • All denizens of the Junkyard already have eye colors matching their hair colors instead of grey before they receive their Atmas.
  • Reinforcing the game setting, Atmas are categorized into 2 tiers: "High Atma" and "Lesser Atma". Each High Atma is unique to an individual and usually stronger than Lesser Atma. Lesser Atma is shared by multiple people. The shapes of the brands of High Atmas are also more elaborate than the weaker tier.
  • Angel uses the term "Asura" instead of "Demon" to describe the form upon activating Atma. The terminology is then adopted by the denizens of the Junkyard.
  • The infested usually transform when their instinct reflexes sense hostility nearby. After getting used to it, it is possible to transform by concentrating the Mantra Om Mani Padme Hum without the presence of offense.
  • Instead of simply losing some portions of HP in the game, being overwhelmed by the hunger results in body parts gradually liquefying into black, sticky tar unless the individual promptly consumes some flesh.
  • Some Asura, like Hayagriva are able to absorb that black tar to fulfill their hunger.
  • Singing doesn't relieve the hunger; instead Sera allows her beneficiaries to take few drops of her own blood to alleviate the uncontrollable state. Her blood is taken by the Embyron to produce the capsules in case Sera is not closely present.
  • Jinana displays great anger towards the Church of Karma, and subsequently Angel, for turning them into Asuras and the ensuing catastrophe due to many of her subordinates going berserk out of hunger.
  • The tribe Wolves, which is originally led by Lupa in-game is instead ruled by Canis Volk. Canis is not simply a replacement of Lupa, as Lupa makes a different appearance later in the novel.
  • Varin Omega's original name is given as William van Beck, instead of Terrence E. Beck as in the games.


Quantum Devil Saga - Avatar Tuner I
Cover for Volume I
Quantum Devil Saga - Avatar Tuner II
Cover for Volume II
Quantum Devil Saga - Avatar Tuner III
Cover for Volume III
Quantum Devil Saga - Avatar Tuner IV
Cover for Volume IV
Quantum Devil Saga - Avatar Tuner V
Cover for Volume V

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