Metal Unit tells the tragic story of human survivors and their war against monsters and machines for control of their home planet. The earth was surrounded from all sides - ancient creatures emerge from the bowels, and alien machines descend from space. The fate of the planet hangs in the balance, but you can tip the scales in favor of the Earthlings as Joanna, a new fighter capable of wearing a powerful steel soldier suit. Help Joanna in her landmark mission to save humanity and take revenge on her sister, who betrayed her own people and went over to the side of the aliens.