Here is the full list of all 44 The Council trophies - there are 32 bronze, 7 silver, 4 gold and 1 platinum.
Collect all the trophies
Complete the story
Complete the fifteenth quest
Reach level 15
Complete the fourteenth quest
Complete episode 4
Join Emily Hillsborrow in your room
Open Pandora's box
Persuade Napoleon that he can trust you
Convince Emily Hillsborrow of the purity of your intentions when she surprises you in her room
Conduct the investigation about your vision
Choose to follow sir Gregory and Cardinal Piaggi
Become a detective
Become an occultist
Be disfigured by Gerard von Borchert
Complete the twelth quest
Raise a skill to level 3
Complete the eleventh quest
Complete episode 3
Complete the ninth quest
Complete the eighth quest
Complete episode 2
Complete the sixth quest
Complete the fifth quest
Overcome 5 confrontations in the same game
Complete episode 1
Reach level 5
Accept to follow Elizabeth Adams
Draw Emily Hillsborrow's secret out of her
Acquire ten skills of level 1 in the same game
Complete a quest without using consumables
Complete the third quest
Manage to get Elizabeth Adams to talk about her past
In the same game, choose 20 answers before the time is up
Use exactly a consumable of each type during a quest
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
Drop to 0 effort points during a quest
Become a diplomat
Get rid of von Borchert with your mother