Reinstall the game on a (preferably an SSD) to rule out hardware failure (bad sectors) on your primary drive.
Ensure the game has permission to read the folder where it is installed. Try running the game's executable ( TombRaider.exe ) as an . Unable To Open Bigfile Bigfile.000
Encountering the error message can be frustrating, especially when you need immediate access to critical data. This article explains why this error occurs and provides step-by-step solutions to recover or open your .000 file. Reinstall the game on a (preferably an SSD)
When nothing else works