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