GameHub

GameHub is a games library manager that allows you to view, download, install, run and uninstall games from Steam, GOG, Humble Bundle, Humble Trove and more. It supports non-native games and native Linux games alike. GameHub also supports multiple compatibility layers for non-native games including Wine / Proton, DOSBox, RetroArch, ScummVM. While at the same time allowing you to add custom emulators.