Updating graphics drivers can help resolve compatibility issues with the game. To update graphics drivers:

The “Unable to open BIGFILE.000 / BIGFILE.000.tiger” error in Rise of the Tomb Raider can be frustrating, but it is rarely a sign of permanent damage to your game or your system. In over 90% of cases, verifying game integrity or adjusting permissions resolves the issue immediately.

Navigate to your primary installation folder (e.g., ...\Steamapps\common\Rise of the Tomb Raider\ ). Locate the specific file named . Right-click the file and select Rename . Change the filename extension to bigfile000.old .