Yeah I remember it being free on Epic Games Store. They gave lot of pretty good games away, and lot of people just sign there up for the free games. So that library cannot be ignored (and shouldn't). It can be added manually to the Library view, but one has to go to Desktop mode and install and manage Epic Games account with Heroic Games Launcher. There is even a plugin for Decky Loader to automate some processes for you and integrate game into the Steam Library: https://github.com/mubaraknumann/unifideck I don't use Epic Games, so cannot talk from personal experience.