01 Understanding Google Play Games Services concepts - myflashlab/GameServices-ANE GitHub Wiki

Before starting with Games Services ANE, it's a very good idea to first understand the concept of how things work around this ANE. Google has wrote a very detailed documentation explaining these concepts. We strongly suggest you to read them and get yourself familiarize with different services of Google Play Games Services before writing any code!

Achievements

Achievements can be a great way to increase your users' engagement within your game. You can implement achievements in your game to encourage players to experiment with features they might not normally use, or to approach your game with entirely different play styles. Achievements can also be a fun way for players to compare their progress with each other and engage in light-hearted competition.
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Leaderboards

Leaderboards can be a fun way to drive competition among your players, both for your most hardcore fans (who will be fighting for the top spot in a public leaderboard) and for your more casual players (who will be interested in comparing their progress to their friends').
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Real-time Multiplayer

Your game can use the real-time multiplayer API in Google Play games services to connect multiple players together in a single game session and transfer data messages between connected players. Using the real-time multiplayer API can help to simplify your game development effort because the API handles the following tasks on your behalf:
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Turn-based Multiplayer (coming soon)##

In a turn-based multiplayer game, a single shared state is passed between multiple players, and only one player has permission to modify the shared state at a time. Players take turns asynchronously according to an order of play determined by the game. Your game can use the turn-based multiplayer API provided by Google Play games services to manage the following tasks:
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Saved Games

The Saved Games service gives you a convenient way to save your players' game progression to Google's servers. Your game can retrieve the saved game data to allow returning players to continue a game at their last save point from any device.
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