The Earth is under attack! Evil alien forces from Mars are invading! The humanity last hope is a team of slightly forgotten heroes. Help Ramdo, Bernie, Mr. Zee, Ivan and Sgt. Pepper fight off those blue invaders! aliens, alien invasion, sci-fi shooter, retro shooter, shoot em up, side-scrolling, action game, shooter game, sci-fi game, space shooter, military shooter, machine gun, laser, survival, Earth defense, hero, action, sci-fi, video game, classic shooter