 <p>Check my library <a href="https://github.com/sergey-miryanov/linden-google-play" rel="nofollow">https://github.com/sergey-miryanov/linden-google-play</a>. Now it supports Leaderboard, Achievements and CloudSave. Another my lib <a href="https://github.com/sergey-miryanov/linden-google-iap" rel="nofollow">https://github.com/sergey-miryanov/linden-google-iap</a> support in-app purchases for GooglePlay.</p>