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