ALDNOAH.ZERO

ALDNOAH.ZERO is an anime series created by Gen Urobuchi (Madoka Magica, Fate/Zero) and directed by Ei Aoki (Fate/Zero). The series was streamed on Aniplex Channel, Hulu, Crunchyroll, and DAISUKI from July 2014.

Plot
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.

Official
Official Website

Other Sources
Anime News Network Crunchyroll