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