play-games-plugin-for-unity | Google Play Games plugin for Unity | Game Engine library

Make sure to do the following if they are relevant to your game:.
Add tester email addresses to the testing section of your game on the Play Games Console.
The SHA1 fingerprint used to create the linked Android app is from the keystore used to sign the Unity application.
To download the plugin, clone this Git repository into your file system (or download it as a ZIP file and unpack it). Then, look for the unitypackage file in the current-build directory:. To install the plugin, simply open your game project in Unity and import that file into your project's assets, as you would any other Unity package. This is accomplished through the Assets > Import Package > Custom Package menu item (you can also reach this menu it by right-clicking the Assets folder). Next, make sure your current build platform is set to Android. From File > Build Settings… select Android and click Switch Platform. You should now see a new menu item was added under Window > Google Play Games. If you don't see the new menu items, refresh the assets by clicking Assets > Refresh and try again.
Next, set up the path to your Android SDK installation in Unity. This is located in the preferences menu, under the External Tools section. To configure your Unity game to run with Google Play Games on Android, first open the Android SDK manager and verify that you have downloaded the following packages. Depending on if you are using the SDK manager from Android Studio, or using the standalone SDK manager, the name of the components may be different. Next, configure your game's package name. To do this, click File > Build Settings, select the Android platform and click Player Settings to show Unity's Player Settings window. In that window, look for the Bundle Identifier setting under Other Settings. Enter your package name there (for example com.example.my.awesome.game). In order to sign in to Play Game Services, you need to sign your APK file, make sure that you are signing it with the correct certificate, that is, the one that corresponds to the SHA1 certificate fingerprint you entered in the Developer Console during the setup. Next, click the Window |Google Play Games|Setup - Android setup menu item. This will display the Android setup screen. Enter the Constants class name. This is the name of the fully qualified class that will be updated (or created) which contains the IDs of the game resources. The format of the name is . . For example, AwesomeGame.GPGSIds. Paste the resource definition data. This is the XML data from the Google Play Developer Console which contains the resource IDs as well as the Application ID for Android. This data is found in the Google Play Developer Console by clicking "Get resources" on any of the resource pages (e.g. Achievements or Leaderboards), then clicking Android. After pasting the data into the text area, click the Setup button. Note: If you are using a web application or backend server with your game, you can link the web application to the game to enable getting the player's id token and/or email address. To do this, link a web application to the game in the Google Play Developer Console, and enter the client id for the web application into the setup dialog.
Google Play Services
Android Support Library
Local Maven repository for Support Libraries (Also known as Android Support Repository)
Google Repository
Android 6.0 (API 23) (this does not affect the min SDK version).
To receive an update whenever the status of the video capture overlay changes, use RegisterCaptureOverlayStateChangedListener. Only one listener can be registered at a time, subsequent calls will replace the previous listener. The listener can be unregistered with UnregisterCaptureOverlayStateChangedListener. The object passed to RegisterCaptureOverlayStateChangedListener must implement CaptureOverlayStateListener from GooglePlayGames.BasicApi.Video. The OnCaptureOverlayStateChanged in that object will be called when the state changes.