Full list of all 42 The Council achievements. It takes around 4-5 hours to unlock all of the achievements in the base game on Windows.
The base game contains 30 achievements, and there are 4 DLC packs containing 12 achievements.
Become a detective
Be disfigured by Gerard von Borchert
Complete episode 1
Reach level 5 in episode 1
Join Emily Hillsborrow in your room
Draw Emily Hillsborrow's secret out of her
Overcome 5 confrontations in episode 1
Acquire ten skills of level 1 during episode 1
Complete the third quest
Persuade Napoleon that he can trust you
Manage to get Elizabeth Adams to talk about her past
In the same game, choose 20 answers before the time is up
Complete the second quest
Avoid being used as a punchbag by Jacques Péru
Assist George Washington
Complete a quest without using consumables
Complete the first quest
Drop to 0 effort points during a quest
Choose to stay with George Washington and Emily Hillsborrow
Persuade Cardinal Piaggi to give you the letter
Become an occultist
Get rid of Gerard von Borchert with your mother
Become a diplomat
Choose to follow Lord Holm and Cardinal Piaggi
Conduct the investigation about your vision
Accept to follow Elizabeth Adams
Use exactly one consumable of each type during a quest
Convince Emily Hillsborrow of the purity of your intentions when she surprises you in her room
Raise a skill to level 3 during episode 1
Open Pandora's box
Complete episode 2
Complete the sixth quest
Complete the fifth quest
Complete episode 3
Complete the ninth quest
Complete the eighth quest
Complete the eleventh quest
Complete the twelfth quest
Complete episode 4
Complete the fourteenth quest
Complete the fifteenth quest
Complete the story