Sooner or later I'll split the game from data so the second part will be easier, allowing custom flatpaks to extend data. The flatpak has received updates especially for keeping an up-to-date runtime but the upstream game, however, has not and Flathub will only show appstream data for the update. You can see on the flatpak manifest repo that latest commit is 6 months old: https://github.com/flathub/com.github.k4zmu2a.spacecadetpinb...