heroiclauncher/heroicgameslauncher

Heroic Games Launcher is an unofficial, open-source alternative to the official launcher apps for Epic Games Store, GOG, and Amazon Games. Instead of running three separate launcher programs to access games you own across those platforms, Heroic lets you log into all three from one application and manage your library in a single interface. The app runs on Windows, macOS, and Linux. On Linux and macOS it includes support for running Windows games through compatibility layers called Proton and Wine, which translate Windows system calls so that Windows-only games can run on non-Windows operating systems. Other features mentioned in the README include cloud save support, a mod management tool, and an offline mode. The project states it collects no telemetry or tracking data. Under the hood, Heroic uses two open-source command-line tools, Legendary for Epic Games and GOGDL for GOG, to handle the actual downloading and launching of games. These tools interact with the store platforms' APIs on your behalf after you sign in with your account credentials. Setup involves downloading the release package for your operating system, installing the app, signing into whichever store accounts you use, and then downloading and playing your games from within the launcher. All games must be legally purchased by the user, the launcher does not provide access to games you do not already own on those platforms. The project is not affiliated with Epic Games, GOG, or Amazon, and is released as free, open-source software. The README is sparse and does not cover system requirements or advanced configuration details.