Google Play Game Services Unity
Unity is a trademark of unity technologies.
Google play game services unity. Game engine integrations several plugins and extensions offer support for google play games services. However this project is not in any way endorsed or supervised by unity technologies. If you follow my advice you would not even to have rewrite your code for ios game center services. To use google play games services sign in with firebase first sign in the player with.
The google play games plugin for unity is an open source project whose goal is to provide a plugin that allows game developers to integrate with the google play games api from a game written in unity. If you are developing your game with a third party game engine you may be interested in using.