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