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.
Use exactly one consumable of each type during a quest
Raise a skill to level 3 during episode 1
Complete a quest without using consumables
Complete episode 1
Accept to follow Elizabeth Adams
Draw Emily Hillsborrow's secret out of her
Overcome 5 confrontations in episode 1
Reach level 5 in episode 1
Acquire ten skills of level 1 during episode 1
Complete the third quest
Persuade Napoleon that he can trust you
Drop to 0 effort points during a quest
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 the first quest
Choose to stay with George Washington and Emily Hillsborrow
Persuade Cardinal Piaggi to give you the letter
Become a detective
Get rid of Gerard von Borchert with your mother
Become an occultist
Become a diplomat
Be disfigured by Gerard von Borchert
Choose to follow Lord Holm and Cardinal Piaggi
Conduct the investigation about your vision
Join Emily Hillsborrow in your room
Convince Emily Hillsborrow of the purity of your intentions when she surprises you in her room
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 episode 4
Complete the twelfth quest
Complete the eleventh quest
Complete the story
Complete the fifteenth quest
Complete the fourteenth quest