The story takes place in a futuristic world where aliens have invaded Earth, and it's up to Andro Dunos to stop them. Along the way, he must fight against hordes of enemies and navigate through challenging levels to reach the final showdown with the alien leader.
Gameplay involves controlling Andro Dunos as he moves left or right across the screen, shooting enemies and collecting power-ups to increase his firepower. The game features a variety of power-ups, including bombs, laser beams, and invincibility shields, which can be used to gain an advantage over the aliens.