Hello!!!
Noticed that the game got updated, so I decided to play through it a bit. Do note that I've only had a single run-through, as it's also pretty late for me.
The current version of this document catalogues a playthrough up to The Electrical Room, dying to The Figure before I could insert the breakers. [I may or may not have missed out on 1.4, whoopss]
I also haven't encountered Halt or obtained the Crucifix, so those won't be mentioned. [I'll experiment with those tomorrow, oh how I love my cheats]
https://docs.google.com/document/d/1Z6IY6IyPlWrDKvS0HJufT5rCMtnMPiJvoX-XCd_lXT0/...