As engaging as it is, there aren't many reasons to replay Heavy Metal Thunder. For the completionists out there, Heavy Metal Thunder alerts you to the amount of "sections" you've missed on account of your many choices, so there is some desire there to go back and experience every branching pathway. But the lack of post-game rewards makes it hard to want to start again. These points aside, one crazy trip through the cosmos with Cubus Games was enough to sell me on this magnificent gamebook adventure and Heavy Metal Thunder will satisfy sci-fi and RPG fans alike. And if you've been enjoying the influx of gamebooks on the App Store as much as we have, then Heavy Metal Thunder is a title you cannot miss.