Dr. Green Alien 2 is the sequel to the first game in the series, and it continues the alien doctor's adventures. Our hero will have to brave the alien underground base he discovered after being abandoned on one of the planets today. Our hero needs your assistance on his quest. On the screen in front of you, Doctor Green will be waiting for you outside the base's main gate. Use the joystick to direct your hero's movements. He must proceed forward in order to gather the strewn green energy batteries. Points will be awarded in Dr. Green Alien 2 for every item you find. All sorts of perils await your hero along the way. These can take the form of both natural and manmade obstacles, such as pits dug into the ground or walls of a set height, or even mechanical devices. You deftly manipulate the hero's actions to guarantee that he will be victorious.