A highly civilized group of aliens has conquered the earth and put the human beings under the control of the Computer Babylon which has begun to kill the human beings. In order to stop the aliens, the people developed a transformable mechanical robot named MagMax. They also chose a brave man for their rescue. The brave man is about to depart to the ultimate battle with the aliens in order to save the human race.
MagMax is an action game fought with a transforming robot. The player can transform himself into a robot, increasing the power as he builds the robot to fight against more than 30 different enemies. Now get ready for the ultimate battle against the gigantic mechanical monster Babylon.
--From the NES Mag Max instruction manual.