Game Center is Apple's way of allowing gamers on iOS and Mac OS to connect with each other, share scores, and even initiate multi-player gaming sessions.
Apple is now allowing App Store and Mac App Store game developers to combat cheaters that like to hike their high scores up to the top of the Game Center leaderboards through the use of hacks.
The company has given developers control over the top 100 players in their game leaderboards, making it so that all unrealistic-looking scores can easily be deleted to level the playing field for all those players out there that are playing fair. Developers now also have the power to block players that use these third-party hacks to try and spoof their scores.
Originally Posted by Apple
Sources: Apple via AppleInsider