The streets of London become your gameboard in the Nike Grid game. Starting on April 23, players will have 24 hours to claim the asphalt crown by earning badges as they run throughout the streets of London. Phone boxes are set up in various postal codes throughout London. Runners check in by dialing their unique game codes on a phonebox in their starting postal code area, and then logging in at other phone boxes throughout various parts of the city. Badges are awarded for speed, stamina and endurance.