Here is the full list of all 50 Black Book achievements.
Succumb to Dark forces
Collect all the songs
Meet your beloved one
Complete Chapter 7
Unlock all the words
Unlock all the black words
Visit 333 locations
Break all the seals
Complete Chapter 6
Collect 50 bailichkas
Retrieve the Book
Collect 70 encyclopedia entries
Complete Chapter 5
Complete Karnysh loyalty quest
Answer 40 Knowledge questions
Talk with 100 characters
Complete Chapter 4
Gather 66 herbs
Collect 30 bailichkas
Complete Chapter 3
Win 3 times in a card game while cheating
Guess all the Obderiha riddles with the first attempt
Read 77 entries in the Onomasticon
Complete Old Egor loyalty quest
Complete Chapter 2
Release the Mermaid
Complete Proshka loyalty quest
Gather 33 herbs
Answer 25 Knowledge questions
Complete White Head loyalty quest
Cow level
Acquire 100 sins
Take seven demons to your service
Release seven dead men
Collect 30 encyclopedia entries
Gather 13 herbs
Complete Chapter 1
Collect 10 bailichkas
Complete Nikolay loyalty quest
Answer 10 Knowledge questions
Win 5 times in a card game
Collect 10 encyclopedia entries
Complete the Prologue
Guess the road in the cursed forest
Collect 4 copies of each card
Don't release the Mermaid
Find all the clues in Nemzya
Negotiate with Susedko on Zemskaia station
Compose a spell out of 13 words
Become a mistress of Hell