March 19, 2013, 6:33 PM — Here's how you can turn on Game Center restrictions on your iPad, iPhone or iPad.
1. Tap on Settings.
2. Tap on General.
3. Tap on Restrictions.
4. Tap on Enable Restrictions.
5. Type in a passcode.
6. Go to the Game Center section.
7. Toggle the Game Center switches to the Off position to disallow them.
8. You can choose from the following options: