Earth Conquer

Year 20xx, a meteor hit the earth, apparently the meteor brought an army of aliens monsters are coming to invade the earth. Humans lose to them until they have to flee to another planet. However, before leaving the earth, a scientist devised blackbox that records the development of the earth and the aliens to be a material when it will reclaim the earth. 200 Years later, Agent 0 is sent back to Earth to retrieve the blackbox as preparations to take back the earth from the aliens