After June 30, Google+ Games will be no more. Google has announced it's pulling the plug on all games through its service, so if you have credits in any games or wish to continue playing, you'll need to pursue that through each individual developer.
Google announced it's pulling the plug shortly after revealing its new games services suite for Google Play
, which is live right now. Google started rolling out games
to its social networking service in the summer of 2011, starting with Angry Birds
, Dragon Age Legends