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