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