A conglomeration of disused, condemned buildings clustered together to form a self-contained habitat, the Infinity Fortress is subdivided into three specific tiers—Lower Town, the Beltline, and Babylon City.

Babylon City, the uppermost level, is said to be where the Brain Trust—a secret organization responsible for the creation of the Infinity Fortress— resides, and is also the home of Ginji's mother.

To enter Babylon City, only those who win an event known as the Ogre Battle will be able to do so, and once they do, they can change the world as they see fit.

The Voodoo King seeks to unlock the gates of Babylon City, sealed several years ago by Ban's grandmother, the Witch Queen.

After a discussion between the two, the Infinity Fortress finally remains largely unchanged, except that the virtual people become real beings.

[3] The character of Ban Mido was originally meant to appear in another series from Aoki, but his editor liked it and wanted it to be one of the manga's protagonists.

[12][13] GetBackers was licensed for English release in North America by Tokyopop, who first announced the acquisition in the Anime Expo 2004 in July 2003.

[18] A guidebook, titled GetBackers: The Last Piece, was released on April 17, 2007, containing information about the series' plot, characters, and popularity polls.

[19] The anime adaptation of the GetBackers series was produced by Studio Deen and was directed by Kazuhiro Furuhashi and Keitaro Motonaga.

[21] The series was released to Region 2 DVD in Japan by TBS in seventeen individual volumes with three episodes per disc.

[22] The anime's music was composed by Taku Iwasaki, and two original soundtracks were released by Pioneer Corporation on January 24 and July 25, 2003.

[12] English volumes from the manga have also been popular, appearing various times in Diamond Comic's rankings of best selling graphic novels.

[46][47] Anime News Network's Liann Cooper has commented on the manga, praising for using the "simple concept" in order to create an entertaining plot.

The Tokyopop translation of the manga has been criticized for making the main characters sound like gangsters giving them strange dialogues.

[48] Cooper later noted that readers from Clamp's works or Rurouni Kenshin would find GetBackers appealing due to the several aspects it has.

[52] DVD Talk's John Sinnott called it a "solid show", enjoying the characters' growth as the series continued.

[59] The anime's last story arc left mixed thoughts to Beveridge who found some of its events predictable or rushed, but still enjoyed the action sequences shown.