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