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