Rise Of The Tomb Raider Unable To Open Bigfile000 Top Now

Fixing the "Unable to Open BIGFILE.000" Error in Rise of the Tomb Raider

Rise of the Tomb Raider is widely considered a masterpiece of action-adventure gaming, pushing the limits of the Crystal Engine with stunning snow physics, vast tombs, and fluid combat. However, for a significant number of PC players, the adventure is cut short before it even begins by a cryptic, frustrating error message:

• Look for logs in the game folder or %LOCALAPPDATA%\ (e.g., under the game's folder). Errors mentioning filename paths or permission denied clues point to OS blocking.
• Use Process Monitor (Sysinternals) to watch attempts to open bigfile000 and see error codes (ACCESS DENIED, NOT FOUND, SHARING VIOLATION).

• The folder: C:\Program Files (x86)\Steam\steamapps\common\Rise of the Tomb Raider
• The file extension: .tiger (if allowed)

4.3. Disable Controlled Folder Access (Ransomware Protection)

Windows Security → Virus & threat protection → Manage ransomware protection → Turn off Controlled folder access (or allow the game .exe). rise of the tomb raider unable to open bigfile000 top

Sometimes this error is triggered by a handshake failure between the graphics API and the game assets. Changing how the game renders can bypass the file-opening hang. Fixing the "Unable to Open BIGFILE

4.5. Run Game as Administrator (Rarely fixes, but harmless)

Right-click RiseOfTheTombRaider.exe → Properties → Compatibility → Run this program as an administrator. Look for logs in the game folder or %LOCALAPPDATA%\ (e

Solution 4: Whitelist Your Antivirus

Sometimes, aggressive antivirus software (like Windows Defender, Norton, or Kaspersky) mistakenly flags bigfile000.tiger as a threat because it is a packed archive file. If the antivirus quarantines this file, the game cannot open it.