Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Witchspawn's End	Unknown.
A Witchspawn's Gaze	Encountered a Witchspawn.
Arachnitopia	Defeated an Arachguhl.
Choosing your Battles	Unknown.
Don't Say Her Name	Defeated a Golonakh Ogre.
Dragonslayer	Defeated a Wounded Dragon.
Evolution's End	Defeated a Nightgaunt.
Experienced Archiver	Viewed 5 Memoriam Recordings.
Found One	Emptied a Treasure Chest.
Found Ten	Emptied 10 Treasure Chests.
Found Thirty	Unknown.
Found Twenty	Emptied 20 Treasure Chests.
Gateway Encounter	Fought a Gateway Encounter.
Guardian Archiver	Viewed 10 Memoriam Recordings.
Guardian Essence	Unknown.
Here We Go Again	Unknown.
Leave With Haste	Unknown.
Mirage Crystallisation I	Crystallised a Mirage.
Mirage Crystallisation II	Crystallised a Mirage 3 times.
Mirage Crystallisation III	Crystallised a Mirage 6 times.
Mirage Crystallisation IV	Crystallised a Mirage 10 times.
Mirage Crystallisation V	Unknown.
Olfana's End I	Unknown.
Olfana's End II	Unknown.
Omen	Clear the Prologue.
One Of The Few	Unknown.
Prison Break I	Unknown.
Prison Break II	Unknown.
Prison Break III	Unknown.
Relearning Your Spells I	Materialized an Ability Tome.
Relearning Your Spells II	Materialized 5 Ability Tomes.
Relearning Your Spells III	Materialized 10 Ability Tomes.
Relearning Your Spells IV	Unknown.
Relearning Your Spells V	Unknown.
Rune Oryx	Used a Rune Oryx.
Sun Oryx	Used a Sun Oryx.
Thankful For Chaos	Unknown.
The Hastress' Pride	Defeated a Hastur.
The Pinnacle of Evolution	Unknown.
The Revenant's End	Unknown.
The Strongest Servant Race	Unknown.
Trainee Archiver	Viewed a Memoriam Recording.
Ultimate Elemental Greatsword...?	Unknown.
Ultimate Essence...?	Unknown.
Ultimate Greatsword...?	Unknown.
Ultimate Katana...?	Unknown.
Ultimate Orb...?	Unknown.
Ultimate Spear...?	Use a Tier 5 Spear in Battle.
Ultimate Sword...?	Unknown.
Variant Encounter	Fought a Variant Encounter.