Where to download new Google Play Game service from Google I/O 13 At Google I/O, Google announced Androids new Google Play game service. From what I remember and from what I've been reading online, it has already been released. Though, I haven't seen it on the Google Play store. 

Is this something that exclusive to certain devices? 

I have a rooted S3 if that matters.
End users don't need to install anything from their side. Google Play Services APK in your device would have already been updated to support Gaming (You can manually install/update Google Play Services framework if something's wrong). Just find a game which uses Game Services API and enjoy!