known bug:
There may be a bug in my level after the first Zipline in the room where there are 2 spiders in cages.
In one cage there is a red key, when Lara picked it up it must extinguish flames on the path to a button. Sometimes the flames do not go.

I advise you to make a "savegame" before picking up the red key, if the flames are not extinguished, reload and retry, it usually corrects the problem.
Eventually you find a savegame ok in the directory "Bug" level that will allow you to continue the game !