Attack on Titan 0 (｢進撃の巨人」0巻 `Shingeki no Kyojin' 0-kan?, lit. "Attack on Titan" Volume 0), also known as Chapter 0, is the draft story written by Hajime Isayama which would later evolve into Attack on Titan. This one-shot manga had a very different setting, but certain aspects of the Attack on Titan world were already in place. It was released alongside the DVD version of the first volume of the anime on July 17, 2013.