I’m new to Linux, using Kubuntu. I got Left 4 Dead 1 installed from Steam and I’m using Proton 8.0. I get an error saying “An error occurred while launching this game: invalid app configuration”. Is there a launch option I should be using? Something else?

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2 points

Try cycling through other proton versions as well. I don’t really understand why some games will work on older versions and not newer ones, but it happens.

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1 point

This is what worked. I had to go down to version 4.2-9 and it finally ran.

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3 points

Just had to find the right magic spell 🙂

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