Each level has 2–3 layers:

Hide in the grandfather clock in the hallway outside his study. When he walks past for the third time, the clock will chime—you have exactly 8 seconds to sprint to the study, grab the letter, and use the hidden bookshelf exit. Do not loot anything else.

In order to get Abysstaker achievement you must complete chapter 4,5 and 6 in specific ways. Steam Community

based on the likely themes of horror, survival, and psychological navigation inherent in such a title. Navigating the Abyss: An Analysis of The Nightmaretaker Guide Introduction

Every bit of damage dealt while a target is feared heals the Nightmaretaker. This lifesteal mechanic ensures that if you don't break the fear cycle quickly, the Nightmaretaker becomes virtually immortal. 3. Top Strategies for Nightmaretaker Players

If someone falls during the Hunt phase, prioritize getting them up as soon as it's safe to move.

If you detect all three, prepare your entry.