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