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