Here is the full list of all 39 Sherlock Holmes Chapter One achievements.
Interrogate every suspect in the safe murder as a police officer.
Talk to The Pipe in the correct disguise.
Find the book.
Follow the rules of the Blind Duelling Club.
Take pity on a poor girl.
Investigate the third accident.
Hold an eel by the tail.
Arrest twenty-five enemies.
Disorient ten enemies with the snuffbox.
Spare the landlady's feelings.
Open Violet's room.
Save Goliath's life.
Find all the books in the Bazookaeology trilogy.
Acquire Sherlock's famous violin.
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.
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.
Refuse to help Mycroft.
Disappoint Mycroft.
Solve all the cases for the police.
Let an old man have his retirement.
Talk to Dilwyn in his hat.
Uncover all of the treasures.
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.