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.
Obtained all recipes.
Defeated the Queen of Shadows.
Created a bottle with Gathering Synthesizer Level 51.
Wrote a record of every exploration.
Defeated all 5 Great Elements.
Defeated the Eternal Sculpture.
Saw everyone move on to chase their dreams.
Created the Crimson Stone and saved Kurken Island.
Defeated the Queen of Darkness.
Defeated the Shining Puni.
Got Ryza's battle level to 50.
Obtained the Revelation Book.
Defeated the Savage Assassin.
Defeated the King of Storms.
Activated everyone's Fatal Drive.
Entered the Kurken Bunker.
Found all treasure chests.
Defeated the Mirage Master.
Found and installed all Power Reactors.
Visited the Holy Tower of Pynnor and learn the truth.
Defeated the Noble Paladin.
Installed the Multiplicauldron at the secret hideout.
Created the Bomb Rod.
Completed requests to get Peter to interview you.
Saved the goat you met on your travels.
Helped Empel regain his former strength.
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 Bug Net.
Helped create Rasen Pudding.
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.
Wrote a record of one exploration.
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.