Link to youtube video: https://www.youtube.com/watch?v=hZmF1bpu_TE&feature=youtu.be
I never make videos, so if the quality sucks, blame it on my first time. Timestamp @ 10:00 proves the awarded achievement.
This took me several hours to figure out, and considering I can’t receive the achievement a second time, it’s not a “perfect” run in that sense. (Notice the amount of saves I went through). Regardless, following the main steps I discuss in the video is all that is required to successfully finish.
Ask any questions you may have.