Although rare, missing system libraries can interfere with the game's ability to parse bigfiles.
This article explains what the error means, why it happens, and how to fix it permanently.
Thankfully, you do not need to be a technical expert to fix this. Here is a complete guide to troubleshooting and solving the issue so you can get back to exploring Siberia with Lara Croft. What Causes the "Bigfile.000" Error?
Ensure you have at least 10–15 GB of free space on the drive where the game is installed. Rise Of The Tomb Raider Unable To Open Bigfile.000
How to Fix the "Unable to Open Bigfile.000" Error in Rise of the Tomb Raider
Follow these troubleshooting steps in sequence to resolve the issue and return to Siberia with Lara Croft. 1. Delete and Re-Validate the Bigfile Archive
To understand the error, it's helpful to know what bigfile.000 actually is. In Rise of the Tomb Raider and other recent games in the series, the developers use a proprietary "TIGER" archive format to store most of the game's data. Files with extensions like .000.tiger are the new standard for these archives. Although rare, missing system libraries can interfere with
Right-click the file and select (or press Shift + Delete to permanently remove it).
The "Unable to open bigfile.000" error in Rise of the Tomb Raider is not indicative of a game-breaking bug but rather a conflict between modern security paradigms and legacy file access patterns. By systematically applying permission corrections, antivirus exclusions, and integrity verification, over 99% of occurrences are resolvable without re-downloading the entire game. Developers and distributors should consider implementing fallback read mechanisms that bypass certain filesystem locks or provide more granular error codes (e.g., "Access Denied" vs. "File Not Found").
If you are trying to launch Rise of the Tomb Raider and getting crashed back to your desktop with the error "Unable to open bigfile.000", you are dealing with a classic data corruption issue. This error means the game launcher cannot read the primary archive file containing the game's core assets, maps, and textures. Here is a complete guide to troubleshooting and
For the remaining few, the solution lies in adjusting a shortcut, running as administrator, or temporarily disabling an overprotective antivirus. In the worst-case scenario, a clean reinstallation is a guaranteed fix. By following this guide, you can overcome this error, rescue Lara from the brink of a launch failure, and get back to scaling icy cliffs and battling Trinity.
Alternatively, use the official software (NVIDIA GeForce Experience or AMD Adrenalin) to download the latest game-ready driver 1.2.1. Summary Checklist via Steam/Epic 1.2.1. Delete bigfile.000 and verify again 1.2.4. Add exclusion to Antivirus 1.2.4. Run as Administrator 1.2.1. Update Drivers 1.2.1.
The error in Rise of the Tomb Raider is a critical initialization failure that prevents Lara Croft's second modern adventure from launching. This error triggers when the Crystal Dynamics engine cannot read its monolithic archive file, known as bigfile.000.tiger . This specific file houses essential core assets, textures, and scripts required for the game to start up. When this asset pipeline is disrupted, the game instantly crashes back to the desktop or refuses to display a window entirely.