Tags: Anime, Cartoon.
Leviathan ~The Last Defense~ (絶対防衛レヴィアタン Zettai Bōei Reviatan lit. Absolute Defense Leviathan) is a Japanese mobile game by GREE. The plot features anthropomorphized dragons as characters. It is a freemium game as the base game is free of charge but game add-ons can be downloaded for various prices. The game was announced in October 2012 and users who preregistered got a rare card.An anime television series based on the game and produced by Gonzo began airing in Japan on April 6 2013.