The core premise of manga-turned-anime series Attack on Titan has always been fantastic: humans armed with swords and equipped with mechanical grapple guns that basically turn them into Spider-Man take on enormous naked giants who are trying to eat them. With the series’ action built around the incredible manoeuvrability and momentum of the Omni-Directional Mobility gear, the genuine unnerving threat of the titans, and the relatively fragility of its human heroes, it’s just primed to be mined for video game inspiration. While official Attack on Titan video games exist, that hasn’t stopped fans from putting their own spin on…