antz is a Japanese manga series written and illustrated by Hiroya Oku. Gantz tells the story of Kei Kurono and his friend Masaru Kato who die in a train accident and become part of a semi-posthumous "game" in which they and several other recently deceased people are forced to hunt down and kill aliens armed with a handful of futuristic items, equipment, and weaponry. Both the manga and anime are noted for their heavy violence and sexual content.
The Gantz anime adaptation, directed by Ichiro Itano and animated by Gonzo, the series contains 26 episodes divided into two seasons. It was licensed in North America by ADV Films. The anime series is distributed in the United Kingdom by MVM Films, and in Australia and New Zealand by Madman Entertainment. Dark Horse Comics started releasing the manga in English in June 2008. A series of two live action movies based on the manga were produced and released in January–April 2011.Overview from themoviedb.org