Athenaeum Game Launcher – Libre Replacement for Steam
Athenaeum is a free and open source game launcher application for Linux. Using Athenaeum you can install, run, uninstall and update games easily. It uses flathub to get the game. So you can find and install any flatpak game in your system. Currently it pulls all Free Software license flatpak games from flathub. It is based on Python/Qt and released under GNU General Public License v3.0.