Check out this list of games that already have integrated Google’s Play Games services

Mountain View yesterday at Google I/O announced something very exciting: Google Play Games services. At the time of this writing, the new Play Games features have only been integrated in a small handful of games, but we should see more integration as time goes on.

There's only a few games that have implemented the new features, including popular titles like World of Goo, Triple Town, Plague Inc., Modern Combat 4: Zero Hour, and Beach Buggy Blitz.

Not every game you come across in the Google Play Store is going to offer the new Play Games features. ”We won't make it a mandatory exercise, or have any certification process around it,” Google lead product manager Greg Hartrell told Engadget. “We create fantastic services that allow developers to create these great game experiences, and help promote their discovery, help retain their users and keep them engaged.”

As much as I'd like to see the Play Games services become a mandatory implementation, it'd at least be nice to see a category in the Play Store that showed you which games are using the new APIs. In the meantime, Droid Gamers has a forum thread with all the games using the new services, which will be updated “until it becomes impossible to do so”.