The Thunder Force saga continues in this video-game in which you must help to protect several planets from total destruction at the hands of a mad alien race looking to conquer the universe.The Thunder Force saga continues in this video-game in which you must help to protect several planets from total destruction at the hands of a mad alien race looking to conquer the universe.The Thunder Force saga continues in this video-game in which you must help to protect several planets from total destruction at the hands of a mad alien race looking to conquer the universe.