https://github.com/playgameservices/play-games-plugin-for-unity
Tutorial: https://codelabs.developers.google.com/codelabs/playservices_unity
Savegame error workaround: https://drive.google.com/file/d/1Mh9JZKPiHr4iYO7JbmXGNX0O4RusQFz1
- Create keystore
- Register game services with keystore SHA1 on GPDC
- Register and publish game on GPDC
- Change SHA1 to the Upload one
- Savegame workaround (if needed)