Here is the full list of all 28 Sherlock Holmes The Awakened achievements.
Find the book about tulpas.
Complete Chapter Two.
Find out how the intruder got into the warehouse.
Learn about the missing Nepali brother.
Complete Chapter One.
Help Barnes with his love life.
Rouse evil from its slumber.
Pick every lock.
Learn more about Gygax.
Make it look back at you.
Complete Chapter Three.
Find out more about the auction.
Pretend to be Barnaby.
Complete Chapter Four.
Unlock the safe.
Help quench the horse's thirst.
Find the raccoon nest.
Complete Chapter Five.
Feed yourself to a gator.
Identify all the unknown substances.
Reach the island.
Complete Chapter Six.
Leave Barnes the book.
Complete Chapter Seven.
Find all evidence at the cliffside crime scene.
Learn about the lighthouse keeper.
Stop the ritual.
Collect all achievements.