Slay the Princess | An Unwound Vessel | Longplay Walkthrough No Commentary
Walkthrough
Complete Chapter 1 by following the steps for the Tower Path. Take the blade after entering the cabin in Chapter 2.
Select "I'm not going to help you...". Then keep choosing to [Slay the Princess].
Slaying The Tower will unlock the Godkiller Achievement!
Make whatever choices you wish during Chapter 3.
This will bring you directly to the Long Quiet. Examine the mirror, then agree to leave after meeting the vessel in the Long Quiet. You will return to the beginning of Chapter 1 in a new cycle.
Bringing The Fury to the Long Quiet will unlock the An Unwound Vessel Achievement!