[Fix] “Failed to initialize authentication interface. Exiting…” (Goldsrc 2.3) – Half-Life

If you encounter “Failed to initialize authentication interface. Exiting…” error in Half-Life, you need to do this;

  • Close Steam client.
  • Run Windows registry editor (regedit).
  • Navigate to HKEY_CURRENT_USER > SOFTWARE.
  • Find “Valve” entry.
  • Delete it.
  • Open Steam client.
  • Launch Half-Life again.

This should fix it 🙂

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