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