Since the invention of the smartphone, the number one concern on everyone's mind is "How can I use this to help prepare for the zombie apocalypse?" And if that's not your number one concern, it should be. Zombies, Run! is a game designed to augment your current running routine with a story and extra, *ahem*, motivation. Of the keeping-your-brains variety.
The game actually started as a Kickstarter project (but what doesn't these days?) and was released on iOS a few months ago.