Here is the full list of all 49 Atelier Ryza: Ever Darkness the Secret Hideout achievements.
Earned all trophies.
Wrote a record of every exploration.
Obtained all recipes.
Activated everyone's Fatal Drive.
Created an item with Item Level 99.
Created a bottle with Gathering Synthesizer Level 51.
Got Ryza's battle level to 50.
Defeated the Queen of Shadows.
Defeated all 5 Great Elements.
Defeated the Eternal Sculpture.
Became a Braver.
Got Ryza's alchemy level to 99.
Defeated the Mirage Master.
Defeated the King of Storms.
Defeated the Noble Paladin.
Found all treasure chests.
Obtained the Revelation Book.
Completed requests to get Peter to interview you.
Defeated the Shining Puni.
Saw everyone move on to chase their dreams.
Created the Crimson Stone and saved Kurken Island.
Defeated the Queen of Darkness.
Defeated the Savage Assassin.
Entered the Kurken Bunker.
Saved the goat you met on your travels.
Found and installed all Power Reactors.
Visited the Holy Tower of Pynnor and learn the truth.
Created the Bomb Rod.
Installed the Multiplicauldron at the secret hideout.
Helped Empel regain his former strength.
Helped create Rasen Pudding.
Wrote a record of one exploration.
Spent the night camping in the Underworld.
Laid eyes on the Underworld.
Installed the Gathering Synthesizer at the secret hideout.
Learned about the history of Ryza and the others.
Created the Bug Net.
Installed a Power Reactor at the secret hideout.
Defeated the dragon at the old castle.
Created the Hammer.
Created the Fishing Rod.
Found one treasure chest.
Built a secret hideout for everyone.
Witnessed the rise of a strange beast.
Attended a tea party with Ryza and Klaudia.
Created the Woodcutter's Axe.
Created the Reaper's Scythe.
Synthesized for the first time.
Visited the mainland for the first time.