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