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