Did this guide help you? Share this article with a fellow gamer who is currently staring at the "Unable to open BIGFILE.000" error in despair. Sometimes, the best tool in a gamer's arsenal is a little knowledge.
💡 If you are using a mechanical HDD, try defragmenting your drive. Large files like bigfile.000 can become fragmented across the disk, causing the game to time out while trying to read it. If you'd like, let me know: Are you playing on Steam, Epic, or the Xbox App ? Rise Of The Tomb Raider Unable To Open Bigfile.000
If the issue persists after all steps, the .bigfile format may have been altered by a patch mismatch. Roll back to a previous game version (via Steam betas) or contact Crystal Dynamics support with a DXDiag log. Did this guide help you
If Windows has restricted "Read/Write" access to the folder where the game is installed, the engine won't be allowed to "open" the file. Navigate to the game's installation folder. Right-click the main folder and select . Uncheck Read-only at the bottom. 💡 If you are using a mechanical HDD,
After analyzing countless forum threads (Steam, GOG, Reddit, and Tomb Raider Forums), the "Unable to open BIGFILE.000" error almost always boils down to one of three scenarios:
A significant number of users who encounter this error are running cracked or pirated versions of Rise of the Tomb Raider . Scene releases (like CPY or PLAZA) often modify how the game reads bigfile.000 to bypass DRM (Denuvo). If you use an outdated crack with a newer game update, or mix files from different repacks, the game will immediately throw the "Unable to open BIGFILE.000" error as a form of integrity check.
a critical game archive file is missing, corrupted, or blocked by system permissions