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