Here is the full list of all 52 Artifact Adventure Gaiden DX achievements.
Speak to His Majesty, the King.
Complete the Hero's Path quest.
Complete the Incurable Disease quest.
Complete the Mysterious Seeds quest.
Complete the Loan Repayment quest.
Complete the Fiend's Nest quest.
Complete the Fort Building quest.
Complete the Uncertain Judgment quest.
Complete the Detective quest.
Complete the Otherworldly Deity quest.
Complete the Report Baton quest.
Complete the Occupied Coalmine quest.
Complete the A Girl and Her Fiend quest.
Complete the X the Rogue quest.
Complete the Disgraced Captain quest.
Complete the Collector quest.
Complete the City of the Golems quest.
Complete the Door to Another World quest.
Complete the Mysterious Facility quest.
Complete the Withering Ruins quest.
Complete the Cave of Memories Lost quest.
Complete the Behind Enemy Lines quest.
Complete the Dragon Village quest.
Complete the Missing Persona quest.
Complete the In search of Crystal quest.
Complete the Barrier Activation quest.
Set the course of the soldier's future.
Set the course of the doctor's future.
Set the course of the thief's future.
Set the course of the mage's future.
Set the course of the war dog's future.
Set the course of the Attendant's future.
Set the course of the Knight's future.
Set the course of the Traveler's future.
Set the course of the Noble's future.
Slay the rampaging dragon.
Slay the rampaging beast.
Slay the deadly mantis.
Slay the fiend.
Slay the crawling eye.
Defeat the Cataclysm.
Defeat the fully awakened Cataclysm.
Slay 1,000 enemies.
Slay 5,000 enemies.
Slay 10,000 enemies.
Fill your coffers with 2,000,000 gold.
Read every book in the underground book vault.
Complete your arsenal with every weapon.
Complete your wardrobe with every armor piece.
Complete your range of personal effects with every accessory.
Complete your Artifact collection with every Artifact.
See the path to the future to its conclusion.