Here is the full list of all 56 Through the Darkest of Times achievements.
Save 500 people total druing all games played
Commit 20 acts of sabotage within the same game
Save 100 people total during all games played
Gain 2000 supporters total during all games played
Player was arrested 5 times within the same game
Commit 10 acts of sabotage within the same game
Hide 10 people from persecution within the same game
Gain 1000 supporters total during all games played
Save 10 people within the same game
Successfully finish Voice of Freedom
Successfully finish Safe Passage
Successfully finish Freedom Bell
Hide someone from persecution
Successfully finish Border Crossers
Successfully finish Where it Hurts
Successfully finish The Great Escape
Play historical event Peace
Finish chapter 4 without any group member dying or leaving
finish chapter four with not more than 7 different Groupmembers during your playthrough
Free 10 people from prison within the same game
Commit 5 acts of sabotage within the same game
Play historical event Volkssturm
Successfully finish Ordinary Man
Play historical event The Prisoner
Save someone from persecution
Play historical event Bombing
Play historical event Kriegsweihnacht
Play historical event Deportation
Commit one act of sabotage
Successfully finish Frozen Lightning
Play historical event Occupation
Play historical event Shelter
Play historical event Laughter
Gain 500 supporters within the same game
Play historical event Neighbors
Play historical event The Camp
Successfully finish Tell the World
Collect 1000 marks in donations within the same chapter
Play historical event The Games
Play historical event French Connection
Play historical event Hitler's Birthday
Play historical event Hindenburg
Play historical event Bloodshed
Collect 750 marks in donations within the same chapter
Gain 100 supporters within the same chapter
Successfully finish The Truth will set them free
Free someone from prison
Collect 500 marks in donations within the same chapter
Play historical event Bookburning
Collect 250 marks in donations within the same chapter
Gain 50 supporters within the same chapter
Play historical event Shopboycott
Play historical event Reichstag Fire
Gain 20 supporters within the same chapter
Collect 50 marks in donations within the same chapter
Play historical event Public Beating