ZAMC (Just like Sex int he City, they have a handy abbreviation) is played both on your Windows Phone and in the real world, using the sensor technology of the platform to guide you around your city with location challenges, gaming challenges through live action video, and a little bit of hide and seek with vital objects the game will hide around Edinburgh, Yerevan, or wherever you are playing the game.
Maybe the teaser trailer will help:
...or maybe not. Anyway, testers are needed for a game where I think working out what is actually going on will be half the fun. You can apply here. Good luck!