Katana Zero. You know when something wriggles its way into your brain and sort of just stays there? Considering it’s been three years since Katana Zero launched, I guess it’s gotten to the point where its toothbrush is next to mine. It’s not even for the reasons you might expect, either. Yes, its side-scrolling action is so buttery smooth it should come with a cholesterol warning. Its soundtrack is sublime. It looks gorgeous. But for me, the chewiest bit is the story.