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