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