Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Mad Tea-Party	Talk with all NPCs.
Attack to the giant's country	Unknown.
Away to the South	Kill the Guardian of the Fire Shard.
But that is another story and shall be told another time	Read all books.
Down the Rabbit-Hole	Discover all secret areas.
Fire walk with me	Kindle a bonfire.
Home Again	Complete the game in Nightmare game mode.
One chants out between two worlds	Die.
Praise the Sun	Consume one sunray.
The blue pill	Unknown.
The Doors of Perception	Collect all Elemental Shards.
The Emperor-Over-the-Sea	Unknown.
The Garden of Live Flowers	Consacrate a Shrine of Power.
The Guardian of the Gates	Kill the Guardian of the Graveyard.
The Home under the ground	Kill the Guardian of the Electricity Shard.
The Last Battle	Defeat the Guardian of the Threshold.
The Magician's Nephew	Use all Shrines of Wisdom.
The Pool of Tears	Collect all Fragments of Luce.
The red pill	Unknown.
The Rescue	Free Aether from a jail.
The Road Through the Forest	Kill the Guardian of the Water Shard.
Which dreamed it?	Unknown.
White Tulip	Unknown.