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