After opening the door to read the alter/book to initiate the "escape" portion of the level, if you are to turn around and leave the crypt following the path which would be given to you after interacting with the alter/book you are unable to end the level. The door at which you would end the level is locked(unable to interact/victory) after you escape the crypt. Furthermore, you are unable to backtrack to the alter/book as once you leave the crypt and go outside you find an impassible door once reentering the crypt, thus, softlocking the mission.