Legendary is a unofficial client for the Epic Games Store on Linux. It is still being actively developed: https://github.com/derrod/legendary

What it does right now:
What works:
- Authenticating with Epic’s service
- Downloading and installing your games and their DLC
- Delta patching/updating of installed games
- Launching games with online authentication (for multiplayer/DRM)
- Syncing cloud saves (compatible with EGL)
- Running games with WINE on Linux
- Importing/Exporting installed games from/to the Epic Games Launcher