If you don't have access to the internet, you can play some games in Offline Mode using the Epic Games Launcher.
To enter Offline Mode:
That's it! Any games you have installed that support Offline Mode can be played.
Note: If you have issues playing a game in Offline Mode, it's probably unsupported. We recommend that you sign in to your Epic Games account to play those games.
Let us know how we can help you.