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