Here is the full list of all 39 Sherlock Holmes Chapter One achievements.
Take pity on a poor girl.
Follow the rules of the Blind Duelling Club.
Talk to Dilwyn in his hat.
Kill fifteen enemies.
Open the cabinet of curiosities.
Always advocate for the refugees.
Punch first, ask questions later.
Spare the landlady's feelings.
Acquire Sherlock's famous violin.
Kill five enemies.
Disappoint Mycroft.
Open Violet's room.
Save Goliath's life.
Find all the books in the Bazookaeology trilogy.
Let an old man have his retirement.
Solve all the cases for the police.
Arrest twenty-five enemies.
Disorient ten enemies with the snuffbox.
Open Sherlock's room.
Arrest ten enemies.
Solve the first case on Cordona.
Eavesdrop on your first piece of gossip.
Try to take the easy way out.
Prank Mrs. Nini.
Lift the curtain on bohemian life.
Get justice for Fabio.
Remember everything.
Interrogate every suspect in the safe murder as a police officer.
Talk to The Pipe in the correct disguise.
Investigate the third accident.
Refuse to help Mycroft.
Find the book.
Hold an eel by the tail.
Uncover all of the treasures.
Complete all Cordona Stories.
Present accurate evidence in all accusations.
Fight in all of the bandit lairs.
Refurbish the entire manor.
Get every achievement.