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