Defend Earth and defeat corrupted A.I.-controlled robots on an aray of missions using your Arsenal, a customizable mechanized battle suit. Choose and equip your Arsenal with a multitude of weapons, obtain more from downed enemy Arsenals, and swap them on the fly to suit your strategy in the face of ever-changing threats that may bring the end of the world. They say it was the greatest disaster in recorded history... The moon tore apart, turning the sky into a kaleidoscope of red light that illuminated all who watched from below. Survive this apocalyptic new age when the self-evolving weapons called "Immortals" have turned on their creators and waged war on humanity. When the moon tore apart, the sky bled red with light, ushering in an apocalyptic new age…and to survive, you must fight. As a mercenary, defend Earth through high-speed combat against corrupted robots in a series of missions from the cockpit of your Arsenal, a fully customizable mech. Equip your Arsenal with a vast array of parts and weapons, obtain more from downed enemy Arsenals, and swap them on the fly to suit your strategy in the face of ever-rising threats.