2nd half of Survivor no death run, unfortunately I couldn't clench the perfect 0 deaths thanks to a horrible certain grapple fail. Downhill from there, but I made it out Alive with the achievement! A lot of fun.
Elevator music adds a perfect touch to the game. For me it seems to add a slight break in the mood that relaxes you just enough so the areas after the elevators are all the more disturbing. I'm amazed the developers didn't include it in the game. I decided to include it myself!