The "Unable to open bigfile.000" error in Rise of the Tomb Raider

Lara realized that the note was hinting at an ancient cipher, one that she had studied during her time at university. She quickly got to work, applying the cipher to the file. After several minutes of intense focus, the file finally opened, revealing a 3D scan of the mine's tunnel system.

How to FIX Rise of the Tomb Raider Not Launching/Not Starting

You will typically encounter the "unable to open bigfile000 top" error in one of four specific scenarios: