Launch your games from various launchers through Steam
CrossLaunch allows you to seamlessly launch games from various platforms directly through Steam. This means you can enjoy Steam's robust features—like controller support and the Steam Overlay—even when playing games from other launchers.
Prefer a standalone setup? CrossLaunch works independently of Steam too, offering a streamlined way to unify your game library for a simpler, more convenient gaming experience.
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Download the newest version archive from GitHub Releases
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Extract the archive
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In your Steam library, add the executable as a Non-Steam Game
How to do that?
Add Non-Steam Game Browse for executable 
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Start CrossLaunch through Steam by clicking Play
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Select a game in the CrossLaunch launcher
- Epic Games Launcher
- Restore dotnet dependencies
dotnet restore - Restore dotnet tools
dotnet tool restore - Run app
dotnet run --project CrossLaunch
- Format files
dotnet csharpier .
Shout-Out to EGDATA, whose API is used to fetch the game images.