You need an original ROM file, and this here, according to the article.

    • @[email protected]
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      1 year ago

      I just tried this out a little bit ago. I couldn’t get the Linux version working but I downloaded the windows version, added it to steam, set the proton version to the newest one (.8 I think? it had an 8 in it) and it worked pretty well

      haven’t tried changing any settings but beat the first mission without any issues 👍

      edit:

      actually, check out the steps in the last comment here https://github.com/fgsfdsfgs/perfect_dark/issues/83