Google has introduced new tools and features for Android mobile developers which will make it easier for them to develop games .
Games has been an integral part of mobile development nowadays and three out of four people who use Andoid phone/tablet play them .
Developers can also now integrate Google Play plug-in for Unity engine
which supports sign-in , achievements , leaderboards and cloud save on Android and iOS.
More here ... http://tinyurl.com/mswxxjf