The year is 2192, and the world is under attack by a giant Enemy Robo menace. In a desperate attempt to counter this apocalyptic threat, the world came together to combine their nuclear arsenal into a giant super mech to to neutralize it.

With 100,000 megatons of pure nuclear power spun up and ready to rock, it falls to you, Earth's last hope, to keep our mech in the fight. If you fail, Earth will finally fall to the overwhelming might of robotic machinery. And that's bad.

Right...?