Here is the full list of all 39 Sherlock Holmes Chapter One achievements.
Prank Mrs. Nini.
Always advocate for the refugees.
Punch first, ask questions later.
Get justice for Fabio.
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.
Investigate the third accident.
Refuse to help Mycroft.
Find the book.
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.
Get every achievement.
Remember everything.
Lift the curtain on bohemian life.
Take pity on a poor girl.
Refurbish the entire manor.
Open the cabinet of curiosities.
Spare the landlady's feelings.
Solve all the cases for the police.
Let an old man have his retirement.
Disappoint Mycroft.
Open Violet's room.
Hold an eel by the tail.
Save Goliath's life.
Acquire Sherlock's famous violin.
Find all the books in the Bazookaeology trilogy.
Arrest twenty-five enemies.
Disorient ten enemies with the snuffbox.
Open Sherlock's room.
Arrest ten enemies.
Solve the first case on Cordona.
Eavesdrop on your first piece of gossip.
Try to take the easy way out.