Rise Of The Tomb Raider Unable To Open Bigfile.000 File

Sometimes, the game process doesn't have the right to read the bigfile.000 because the file is protected by User Account Control (UAC).

Since the error points to a specific missing or corrupt file, the first step is to let the game launcher check itself.

For Steam Users:

For Epic Games Store Users:

Why this works: The verification process compares your local files to the master version on the server. If bigfile.000 is even 1 byte off, it gets replaced. Rise Of The Tomb Raider Unable To Open Bigfile.000

If you bought the game on Steam, corrupted files are the most likely culprit. Steam can compare your local bigfile.000 with the master copy on its servers and repair it.

Steps:

Note for Epic Games Store users: The process is similar. Open the Epic launcher, click the three dots next to Rise of the Tomb Raider, and select Verify.

If the file is missing or corrupted, the platform launcher (Steam/Epic/Microsoft Store) can repair it. Sometimes, the game process doesn't have the right

A corrupted download cache can cause future downloads to fail or write data incorrectly. For Epic Games Store Users: