Google is kicking off games services on its Play Store that allows developers to add achievements, social and public leaderboards, cloud saving, and real-time multiplayer. The games service goes live today and works completely on Android, and mostly on iOS or other "connected devices" that second batch won't support multiplayer.

Google Play's games services differs from Apple's Game Center in that it offers backend support, rather than a standalone application.

Anyone making a game with Google Play has access to its developer services. A handful of games already have these services incorporated: World of Goo, Super Stickman Golf 2, Beach Buggy Blitz, Kingdom Rush, Eternity Warriors 2 and Osmos.
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--jeremy