The error "Unable to Open Bigfile.000" in Rise of the Tomb Raider
typically indicates a corrupted installation file, a conflict with your security software, or a lack of system resources during the loading process. Primary Fixes
Verify Game Integrity: This is the most common and effective solution. It forces your launcher to scan for missing or damaged parts of the bigfile.000 and redownload them.
Steam: Right-click the game in your Library > Properties > Installed Files > Verify integrity of game files.
Epic Games: Go to your Library, click the three dots on the game tile, and select Manage > Verify.
Check Disk Space & Memory: This error can be triggered if your drive is full or your PC runs out of RAM while trying to unpack the large archive file. Ensure you have at least several gigabytes of free space on your installation drive.
Add Antivirus Exclusions: Security software often flags these large .tiger or .000 files as false positives, blocking the game from accessing them. Add your entire game installation folder to the Exclusion/Exceptions list in Windows Defender or your third-party antivirus. Advanced Troubleshooting
The "Unable to open bigfile.000" error in Rise of the Tomb Raider Rise Of The Tomb Raider Unable To Open Bigfile.000
typically indicates corrupted, missing, or permission-blocked game data files. Primary fixes include verifying game file integrity via Steam or Epic Games, renaming the file to force a re-download, and adjusting antivirus exclusions. For a detailed list of potential solutions, visit Steam Community unable to start game- bigfile bigfile.000! error
The "Unable to open bigfile.000" error in Rise of the Tomb Raider typically indicates a corrupted game archive or a system permissions conflict that prevents the game from accessing its primary data assets. Quick Fixes
Verify Game Files: This is the most effective solution for file-specific errors.
Steam: Right-click the game in your library > Properties > Installed Files > Verify integrity of game files.
Epic Games: Click the three dots on the game tile > Manage > Verify.
Run as Administrator: Right-click the game's executable (ROTTR.exe), select Properties, go to the Compatibility tab, and check Run this program as an administrator.
Disable Antivirus: Temporarily disable your antivirus or add the game folder as an exception, as security software can sometimes block access to the .000 archives. Advanced Troubleshooting The error "Unable to Open Bigfile
Manual File Replacement: If verification fails, navigate to the game's installation directory and delete the bigfile.000 file manually. Then, run the verification tool again to force the launcher to download a fresh, uncorrupted copy.
Update GPU Drivers: Ensure your graphics drivers are current. You can update them via NVIDIA GeForce Experience, AMD Software: Adrenalin Edition, or the Device Manager.
Check Storage Space: Ensure you have at least 35 GB of free space on your drive. Low disk space can prevent the game from properly caching or opening large archive files.
Compatibility Mode: In the executable's Compatibility tab, try setting the mode to Windows 8 or Windows 7 and check Disable fullscreen optimizations.
Which launcher (Steam, Epic, or Xbox) are you currently using to run the game?
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:
bigfile.000 is corrupted or missing and will automatically redownload it (usually 5-15 GB).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.
Few things are as frustrating as settling in for an evening of gaming, launching Rise of the Tomb Raider, and being greeted not by the snowy peaks of Siberia, but by a cryptic error message: "Unable to open bigfile.000."
This issue has plagued PC gamers for years, often appearing immediately after installation or following a system update. The error is essentially the game’s way of saying, "I cannot read my own vital data files." Since the .000 file is a core archive containing game assets like textures, sound, and levels, the game cannot start without it.
Do not worry. This error is almost always fixable without reinstalling your entire operating system. Below is a comprehensive guide to diagnosing and fixing the "Unable to open bigfile.000" error in Rise of the Tomb Raider.
If all else fails, back up your saves (usually in Documents\Rise of the Tomb Raider), then uninstall and reinstall the game completely. This ensures a fresh, uncorrupted BIGFILE.000.
Security software often flags large archive files as suspicious due to their structure.
C:\Program Files (x86)\Steam\steamapps\common\Rise of the Tomb Raider