How to Change Your Nickname on Apple Game Center

Tap the “Game Center” icon on your iPod Touch, iPhone or iPad device.
Tap the “Account” button on the main screen. Your email address is listed on this button.
Tap “View Account” when asked what you want to do with the account.
Scroll down and tap the “Nickname” button under “Game Center Identity.”
Type in a new nickname for your Apple Game Center account.
Tap “Go” to complete the process of changing your Game Center nickname.
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