Google may be preparing to unveil an Android gaming service in the vein of Xbox Live or iOS' Game Center. That's the indication from a leaked build of Google Play Services obtained by Android Police, which appears to reveal several details about a platform to be known as Google Play Games. The file contains references to achievements, in-game chat, matchmaking, cloud save syncing, and leaderboards, along with a green controller-shaped icon.
The service appears to have deep hooks into Google+. Google's social network looks to handle all user ID information for Google Play Games — for example, you can limit notifications to those sent from people in certain circles, and you'll be able to share scores directly on Google+. Android Police notes that most of this leak corroborates information obtained earlier from the Google Glass companion app; with Google's annual I/O conference taking place in just a few days, an official announcement may well follow soon.