Full Game Walkthrough...

Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Champion's Path	Defeated a Nightlord with each character.
Augur	Defeated Maris, Fathom of Night.
Darkdrift Knight	Defeated Fulghor, Champion of Nightglow.
Dawn	Reached the ending.
Dresser	Changed garb via dresser for the first time.
Equilibrious Beast	Defeated Libra, Creature of Night.
Fell Omen	Completed Fell Omen raid.
Fissure in the Fog	Defeated Caligo, Miasma of Night.
Gaping Jaw	Defeated Adel, Baron of Night.
Legendary Armament	Acquired a legendary armament for the first time.
Mastery	Attained maximum level.
Mountaintop	Found the secret of the Mountaintop.
Night Aspect	Defeated Heolstor the Nightlord.
Night Begins	The Night Aspect appeared.
Nightlord Conqueror	Defeated all Nightlords.
Nightlord Slayer	Defeated three different Nightlords in a row.
Nightreign	Earned all achievements.
Noklateo, the Shrouded City	Found the secret of Noklateo, the Shrouded City.
Obtained Vessels	Acquired a great many vessels.
Old Gaol	Completed the oldest gaol.
Plague of Locusts	Completed Sentient Pest raid.
Relic	Invoked the power of a relic for the first time.
Replenished Sacred Flasks	Acquired a great number of flask charges.
Rotted Woods	Found the secret of the Rotted Woods.
Sentient Pest	Defeated Gnoster, Wisdom of Night.
Set and Steadfast	Acquired many pieces of high-rarity equipment on a single expedition.
Shifting Earth	Found the secrets of all Shifting Earth locations.
The Crater	Found the secret of the Crater.
The Duchess Joins the Fray	The Duchess became a playable character.
The Nightlords	The Nightlords appeared.
The Revenant Joins the Fray	The Revenant became a playable character.
The Shrouded Roundtable Hold	Reached the Shrouded Roundtable Hold.
Tricephalos	Defeated Gladius, Beast of Night.
True Arbiter	Completed Equilibrious Beast raid.
Typhoon	Completed Augur raid.
Untold Power	Defeated ten or more great enemies on one expedition.
Vessel	Acquired a new vessel and conducted a different relic rite for the first time.