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Android Police’s Ron Amadeo has the details on the new syncing, matchmaking, notifications, game invites, achievements, leaderboards, and integration with other Google services that are inside the new Gaming APK that is being rolled out to devices.

Fresh out of Google HQ, we’ve managed to score a copy of the newGoogle Play Services v3.1.36, which is very slowly rolling out to devices right now. For comparison, the current Play Services that most people have is v3.0.27. 3.1 is a massive update – the strings file, for instance, has more than doubled from 300 to 700 entries. This is how Google is pushing out all the shared files for Google Play Games.

To make a long story short, there is a lot of new stuff here and most of it has ties to Google Plus. Shocking, I know.