: Allow the launcher to re-download the missing gigabytes and then launch the game. Secondary Troubleshooting Steps
Diagnostic steps (what to check first)
Disable the following overlays one by one and test the game after each: shadow of the tomb raider unable to open bigfile.000
: Ensure you have at least 10–15 GB of free space on the drive where the game is installed. This error has been linked to "Out of Memory" issues or insufficient disk space for unpacking game assets. : Allow the launcher to re-download the missing