Now that we are approaching the release state, we have to start working with the developer console.

The first thing we need to do is to get into the Game services section of the console to create and configure a new game. In the left menu, we have an option labeled Game services. This is where you have to click. Once in the Game services section, click on Add new game:

This bring us to the set up dialog. If you are using other Google services like Google Maps or Google Cloud Messaging (GCM) in your game, you should select the second option and move forward. Otherwise, you can just fill in the fields for I don't use any Google APIs on my game yet and continue. If you don't know whether you are already using them, you probably aren't.

Now, it is time to link a game to it. I recommend you publish your game beforehand as an alpha release. This will let you select it from the list when you start typing the package name.