New Google Play services brings Google Plus-powered friends, leaderboards, achievements to Android, iOS and web - Polygon

Google today announced Google Play game services, a first-party suite of gaming-specific services that joins similar services on other platforms, like Apple's Game Center and 's GameCircle.

Get Started With Google Play Games Services

New Google Play services brings Google Plus-powered friends, leaderboards, achievements to Android, iOS and web - Polygon

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New Google Play services brings Google Plus-powered friends, leaderboards, achievements to Android, iOS and web - Polygon

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How to integrate Google Play games services — Android, by Abedalkareem Omreyh

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New Google Play services brings Google Plus-powered friends, leaderboards, achievements to Android, iOS and web - Polygon

Add Google Play Game Services to your Android Game in Unity - Leaderboards Tutorial