Troubleshooting Guide: How to Fix the "Unable to Open Bigfile.000" Error in Rise of the Tomb Raider

Few things are as frustrating as settling in for a gaming session, only to be stopped dead in your tracks by a fatal error. For players of Rise of the Tomb Raider, one of the most common and confusing issues is the error message: "Unable to open bigfile.000." Rise Of The Tomb Raider Unable To Open Bigfile.000

Conclusion

• Research and analysis: 2 days
• Development: 10 days
• Testing and refinement: 5 days
• Launch: 3 days

Steam: Right-click the game in your Library → Properties → Installed Files (or Local Files) → Verify integrity of game files... . The "Unable to open bigfile

The most common cause is a corrupt bigfile.000 during the initial download or an update. Instead of reinstalling the entire game, use the built-in repair tools: Research and analysis: 2 days Development: 10 days

Microsoft Store/Xbox App Fix: If you are playing through the Xbox app on PC, you can use a PowerShell command to force the store to refresh its file licenses and scripts.

For Epic Games Launcher Users: