Zombies, Run!

Zombies, Run! is a smart phone app that plays a serialized audio drama while you run. In the drama, you are being pursued by zombies and must run away from them. The apps uses the GPS built into your device to track how far and how fast you are moving, then drops in a series of progressively menacing audio messages about a zombie attack developing all around you. You can also gather (in game terms) virtual resources and weapons along your path and add them to your stockpile on your home computer for a related computer video game.