This article introduces public Gamerzilla server. An open source game achievement system to store and share game achievements.
My article on Gamerzilla is available on Fedora Magazine. Gamerzilla is an open source game achievement system. The article describes how to create an account on a server and setup the gnome shell extension to upload your achievements.
Implemented it for Acid Flight.
https://thunderperfectwitchcraft.itch.io/acid-flight
worked like a charm. Can't test the online support, but the offline variant didn't cause no trouble and saved my stuff correctly.