Aldnoah.Zero (Japanese: アルドノア・ゼロ, Hepburn: Arudonoa Zero, stylized in logo as ΛLDNOΛH.ZERO) is a television and print series created by Olympus Knights and A-1 Pictures.

It presents the fictional story of the Vers Empire's 37 clans of Orbital Knights' attempted reconquest of Earth—enabled by the empowering titular Aldnoah energy/drive technology—following return to Earth as a more technologically advanced people after a human diaspora to the planet Mars.

The series began in July 2014, and as of March 2015, had presented two 12-episode seasons, with Urobuchi, Katsuhiko Takayama and Shinsuke Onishi, and then Hiroyuki Sawano and Kalafina, respectively, receiving principal script-writing and music credits.

After settlers discover additional alien technology on Mars (dubbed "Aldnoah"), they unilaterally declare independence from Earth to found the Vers Empire.

[6][7] The first soundtrack album was released on September 10, 2014 featuring 20 tracks, including vocal performances by Aimee Blackschleger, Cyua, Mika Kobayashi, and mpi.