Game Center is an Apple product.
Game Center is a pre-installed app on your iPad, iPhone or iPod. It uses your Apple ID as a log in and is a place where you can view your iOS game achievements.
The Game Center connects with Diamond Dash. By achieving certain goals in Diamond Dash you can unlock game achievements which are then shown in the Game Center app.
For more information please visit: http://www.apple.com/game-center/
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