The game is currently experiencing issues with save file data on Linux environments, unfortunately we have not found a fix yet and have removed the Linux version.
To play the game on Linux follow these steps
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Install the game on a Linux environment
Click on Settings
Click on Properties
In General Turn off Steam Cloud (If left on, it will corrupt your files. You will have to use a separate one)
Click on Compatibility
Check Box "Force the use of a specific Steam Play compatibility tool"
In the Drop Down select "Proton 9.0-4"
Your all set!