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