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