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