Here is the full list of all 49 Atelier Ryza 2: Lost Legends & the Secret Fairy achievements.
Discovered the Ancient Mana Workshop crystal.
Completed all of Cassandra's character events.
Obtained the Mana Lantern.
Completed all of Klaudia's character events.
Discovered the Sunken City of Stars crystal.
Discovered the Maiden's Catacombs crystal.
Completed first ruin in the Exploration Diary.
Found the Spirit Beast Whistle.
Defeated an enemy shrouded in darkness.
Found the Emerald Band.
Defeated a giant enemy.
Created an Air Drop.
Earned max reputation with any one group.
Met Fi.
Synthesized an item for the first time.
Crossed the ocean and reached the continent.
Unlocked All Achievements.
Discovered the Mirage Land crystal.
Discovered the Dragonbone Valley crystal.
Obtained an everlasting treasure on a grand adventure.
Completed all of Lent's character events.
Completed all of Tao's character events.
Completed all of Patricia's character events.
Completed all of Clifford's character events.
Completed all of Serri's character events.
Completed all of Bos's character events.
Completed all of Zephine's character events.
Completed all of Dennis's character events.
Completed all of Romy's character events.
Earned max reputation with all groups.
Obtained all decoration items.
Obtained all decoration accessories.
Obtained all gathering and adventure tools.
Completed everything on the research list.
Collected all Ruin Fragments and Memory Vestiges.
Completed all ruins in the Exploration Diary.
Created a level 99 item.
Created an item with 999 quality.
Created an Evolved Item.
Used an essence during synthesis.
Used all essences.
Unlocked all alchemy skills in the Skill Tree.
Unlocked a Core Element.
Raised a rare Puni.
Maximized the Development Level of any category.
Unleashed all Fatal Drives.
Activated all Core Drives.
Defeated the Legendary Monarch.
Defeated the Last Sentinel.