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.
Obtained all recipes.
Obtained the Revelation Book.
Defeated the Queen of Shadows.
Completed requests to get Peter to interview you.
Defeated all 5 Great Elements.
Defeated the Eternal Sculpture.
Defeated the Savage Assassin.
Found all treasure chests.
Got Ryza's battle level to 50.
Activated everyone's Fatal Drive.
Helped create Rasen Pudding.
Wrote a record of every exploration.
Saw everyone move on to chase their dreams.
Created the Crimson Stone and saved Kurken Island.
Defeated the Queen of Darkness.
Defeated the Noble Paladin.
Defeated the King of Storms.
Defeated the Mirage Master.
Defeated the Shining Puni.
Found and installed all Power Reactors.
Created the Bomb Rod.
Entered the Kurken Bunker.
Wrote a record of one exploration.
Installed the Multiplicauldron at the secret hideout.
Saved the goat you met on your travels.
Visited the Holy Tower of Pynnor and learn the truth.
Helped Empel regain his former strength.
Created the Bug Net.
Found one treasure chest.
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.
Created the Hammer.
Created the Fishing Rod.
Defeated the dragon at the old castle.
Installed a Power Reactor at the secret hideout.
Created the Woodcutter's Axe.
Built a secret hideout for everyone.
Witnessed the rise of a strange beast.
Attended a tea party with Ryza and Klaudia.
Created the Reaper's Scythe.
Synthesized for the first time.
Visited the mainland for the first time.