There is something wrong with the .sh file (linux version) where when you go to launch the game it instead opens up apps like krate where you can instead view the code instead of just starting the game.
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I suppose that’s on you. If the file isn’t executable, it opens a text editor. To fix this follow this guide:
1) open a console and cd into the directory where the .sh is stored.
2) enter following command: „chmod +x (file.sh)
3) open the file (either with double clicking or in the console: ./{file.sh}