Here is the full list of all 48 Atelier Ryza 3: Alchemist of the End & the Secret Key achievements.
Completed a random quest for the first time.
The four set out on an adventure.
Discovered a memoir for the first time.
Discovered a Landmark for the first time.
Unlocked all achievements.
Stirred up the conflict of Sardonica.
Once again landed in the Underworld.
Reunited with Fi.
Created the Key of Truth.
Set out on a journey to find someone to entrust your legacy to.
Completed Klaudia's side story.
Completed Lent's side story.
Completed Tao's side story.
Completed Patricia's side story.
Completed Empel's side story.
Completed Lila's side story.
Completed Bos's side story.
Completed Federica's side story.
Completed Dian's side story.
Completed Kala's side story.
Built an atelier.
Expanded an atelier to maximum size.
Completed the Alchemy Skill Tree.
Discovered all landmarks.
Made friends with the Water Beast.
Made friends with the Land Beast.
Created a key at a landmark.
Created a rare key.
Activated 6th stage effect using Link Morph.
Successfully synthesized a level 3 recipe.
Successfully synthesized an item with super traits.
Collected all cooking recipes.
Obtained an item from a rare supply point.
Acquired skills by using Core Crystals.
Obtained all Exploring and Adventuring Tools.
Raised a level 50 Puni.
Discovered all memoirs.
Completed all world quests in one region.
Completed at least one world quests from every region.
Caught an insect of a specific size.
Caught a marine creature of a specific size.
Completed request of the 3 sword master brothers.
Used Order Drive for the first time.
Defeated an enemy using Key Modification.
Used Key Creation on a tough enemy.
Activated all Fatal Drives.
Manifested all Roles.
Defeated the Code of the Universe.