Celestial Impact Invasion

A meteorite crashes into Earth, leaving a dangerous amount of radiation that engulfs a huge area of a city, horribly mutating humans and exposing them to lethal levels of radiation. Alongside the meteor, unknown celestial aliens arrive with plans unknown for the planet and a powerful yet dangerous substance known as celestial ore. You fight against many powerful bosses and formidable foes willing to do anything to get their hands on celestial ore, to stop them from using it for their own evil purposes. On top of all that lies the bigger problem at hand: what exactly came down to Earth inside the meteor, what it is, and what will happen to the planet if it's not handled in time. It all depends on you as the last hope to save the world!