"When I'm out there, sweating, especially if I'm a beginner, I don't want to get a badge after I finish," Hon explained when I asked him about the game's origins. "I'm not interested in seeing a map of the territory after my run. That sucks. I want to transform the ordinary experience of this activity. That's why the game is basically audio, and why it has a story. Because otherwise it's going to disrupt the activity without doing anything to transform it." At the heart of Zombies, Run!, in other words, there beats a lovingly crafted audio drama (having an internationally bestselling, award-winning author as its co-creator helps with this). And while every aspect of the game is built around the act of running, it remains – crucially – entirely relaxed about how far, fast and often you do so.