Black: Mesa-codex

: Run the game as an Administrator to ensure it has permission to write save files to your C:\Users\[YourName]\AppData or the game installation folder. Gameplay & Survival Tips

: To unlock the secret "Pizza" ending, you must carry Dr. Horn's pizza box from the cafeteria in Questionable Ethics all the way to the final boss in Xen, as detailed on the Combine OverWiki . Are you running into a specific error code or Black Mesa-CODEX

: If you encounter missing or black textures, users on Reddit suggest checking your DirectX version or updating your GPU drivers to ensure compatibility with the game's lighting engine. : Run the game as an Administrator to

: Ensure your antivirus hasn't quarantined the Steam_api64.dll file, which is a common issue with CODEX releases. You can find troubleshooting steps for this on Reddit's r/CrackSupport . Are you running into a specific error code

: A standard playthrough takes about 15 hours , while 100% completion (including achievements) can take up to 27 hours , according to HowLongToBeat .