In this session you'll learn how to use Game Center in an iOS app. Game Center is supported since iOS 4.1. It's Apple's new social network. Game Center enables users to track their best score on a leaderboard, compare their achievements, invite friends to play a game, and start a game through auto-matching. This session is only useful if you are a paid developer, because if you are not, you can't setup the Game Center achievements and leaderboard in iTunes Connect.