If you can tell me and if you have recently updated the game , I can provide more specific steps. Share public link
Relaunch Steam, right-click , select Properties , head to Installed Files , and click Verify integrity of game files .
Right-click on and select Properties . Navigate to the Installed Files tab. Click Verify integrity of game files . shadow of the tomb raider unable to open bigfile.000
typically indicates that a critical game file is corrupted, missing, or blocked by your system
Does the crash happen or during a specific cutscene ? If you can tell me and if you
Select (and any other bigfile numbers the error message specifies) and Delete them. Return to your game launcher.
Persistent failures when verification loops or errors out continually. Navigate to the Installed Files tab
Inspect your hard drive for errors or bad sectors:
Follow these solutions in order. Do not skip the verification steps.
Right-click Shadow of the Tomb Raider in your Library →right arrow Properties →right arrow Installed Files →right arrow Click Verify integrity of game files .