" Great game mechanics can even create achievement out of nothing. Airlines turned loyalty into a status symbol. Foursquare made it a mark of distinction to be a fixture at the corner bar. And by encouraging players to post their achievements on Facebook, online game makers have managed to convince people to proclaim loudly—even boast—that they spend hours playing computer games every day. "

― Jonah Berger , Contagious: Why Things Catch On