Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Bookshelf Bonus	Find the Lovecraft book in the Worm's feast.
Bug Killer	Prepare the mixture for the dangerous insects.
Bygone Days Telling Tales	Finish the first dream sequence.
Childhood Trauma	Finish the childhood dream sequence in the Loried mansion.
Cover Up	Find the protective suit.
Down in the Dumps	Enter the Mansion cellar.
Family Reunion	Discover your father's coffin in the tomb.
Flashlight Collector	It is good to have enough flashlights.
Going Down	Solve the disc puzzle in the elevator.
Gotta hand it to you	Find Monkey's Paw Secret.
Grim Discovery	Discover Henry's dead wife.
Hidden Room	Find the secret room in the underground galleries of the old stone building.
In Remembrance	Solve the recollections of the past book puzzle.
Into the Darkness	Solve the steam puzzle in the elevator.
Keen Mind	Underline Arkhamend in the letter that Loath Nolder left.
Keep Looking Down	Find the concealed compartment in the floor of Nathanael's room.
Last leap into Unknown	Use the last puzzle piece on the door beneath the well.
Last Piece	Retrieve the third part of the key, from grandma's room.
Lesser of Two Evils	Choose the good ending.
Long Awaited Reunion	Speak with Loath Nolder.
Lord of the Secrets	Find the book of Darkness Within 1 along with a Lovecraft book in the mansion.
Making a new friend	Find the Homunculus experiment.
Master Detective	Find a symbolic picture of the Zoetrope development team on the table.
Meadow Mystery	Find the stone building in the forest glade.
Necromancer	Summon Wolfgang Schneider from beyond
No Outsiders Here	Find the Dead Reporter Secret.
No Stone Unturned	Open the small trapdoor which holds the key to the underground galleries of the old stone building.
Pessimist	Doom and Gloom
Piece it Together	Solve the jigsaw puzzle in the old stone building.
Pull back the Vale	Retrieve the whereabouts of the mansion named The Gate.
Search high and low	Open the Secret Kitchen Room.
Second Piece	Retrieve the second part of the key, from the nursing home.
Seeker of the things that should not be	Find a metallic box with a copy of Necronomicon and a statue of Cthulhu.
Smooth Talker	Persuade Henry to sell the book.
Statuesque Secret	Unravel the Native Bust Secret.
Sweep the Floor	Find the attic trapdoor in the cottage.
Toys and Tools do mix	Combine elements to get a secret Ankh.
Unlock the Secrets Inside	Acquire the key to the door in the first dream.