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