When I start Portal 2, I get the following error message: Error message

Afterwards, the game just crashes, leaving me unable to play the game.

Why is this happening, and how can I fix it?

  • You never ask your question, and nobody will be able to help you if you don't be very specific with your question.
    – Parzival
    Commented May 31, 2017 at 19:21
  • 4
    Have you tried verifying your local files in Steam? Commented May 31, 2017 at 19:27
  • Everything I find on the internet about this points to file paths being incorrect. steamcommunity.com/app/17520/discussions/2/648814845566466176 for example - not the same game, but it is a Source Engine game.
    – Timmy Jim
    Commented May 31, 2017 at 19:35
  • How was it installed?
    – Frank
    Commented Jun 1, 2017 at 12:21
  • Ive tried Verifying And Reinstalling
    – EyStGu
    Commented Jun 2, 2017 at 13:39

1 Answer 1


Here is the contents of this file on my linux machine (which shouldn't matter). I've removed the comments included with it for brevity.

    "file"      "scripts/surfaceproperties.txt"
    "file"      "scripts/surfaceproperties_portal.txt"
    "file"      "scripts/surfaceproperties_portal2.txt"

The file is located in my

.../steam/steamapps/common/Portal 2/portal2/scripts/

directory. I'll assume from your question that this file isn't already present there.

  • I believe in my searches for an answer to this question I saw someone try to just give the code of the script as you did, and it did not appear to resolve the issue.
    – Timmy Jim
    Commented Jun 1, 2017 at 2:04

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