Aldnoah.Zero (アルドノア・ゼロ, Arudonoa Zero), stylized as ΛLDNOΛH.ZERO, is a mecha anime television and print series created by Olympus Knights and A-1 Pictures. Created by Gen Urobuchi with direction by Ei Aoki, the series features principal Japanese voice acting by Natsuki Hanae, Kensho Ono, and Sora Amamiya, with animated relational and battle scenes set on or in the fictional earth of 2014, the orbital castles of Vers Empire's Orbital Knights, Vers bases on a shattered remnant of earth's moon, and occasionally, the Vers palace of its failing emperor on Mars. The series began in July 2014, and as of March 2015, had presented two full 12-episode seasons, with Urobuchi, Katsuhiko Takayama, and Shinsuke Onishi, and then Hiroyuki Sawano and Kalafina, respectively, receiving principal script-writing and music credits. In the accompanying manga, Olympus Knights and Kiyokazu Satake, and then Pinakes and Mahi Fuyube, respectively, receive writing and illustration credits.
In 1972, the Apollo 17 mission discovered a hypergate to Mars on the surface of the moon. Soon a war breaks out between Earth and Mars, and Martian soldiers begin to descend from the sky, riding steel giants, intent on exterminating humanity.