The most common culprit is a corrupted data packet. If the bigfile000.tiger file was interrupted during download or damaged by a hard drive hiccup, the game cannot read it. Open your Steam Library. Right-click on Rise of the Tomb Raider. Select Properties, then go to the Installed Files tab. Click Verify integrity of game files.
This is the first and most effective fix for 70% of users. Verification scans every bigfile and redownloads only the corrupted pieces. rise of the tomb raider unable to open bigfile000 top
