Here is the full list of all 30 Syberia: The World Before achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Retrieve Dana's letter from the automaton.
Get on board for a new destination.
Choose one of Leon's paintings and see it years later with Dana.
Find the poster of the super resistant.
Leave the cemetery.
Find all the points of interest in the cemetery.
Leave Misty Bridge with Colonel Blake.
Achieve half of your secondary goals.
Fill the water bottle before leaving base camp.
Leave the Musicians District.
Look at Dana's drawing in the cement with Kate.
Find Oscar again.
Leave the Flower District again.
Find all the copies of a literary classic.
Search all possible terms you can on the computer.
Leave the Silberspiegel refuge.
Do not report Leni to Junta.
Choose a painting for Herr Gustav.
Leave the Antiques District.
Leave the Flower District.
Empty your email account.
Get out of the mine.
Achieve your first secondary goal.
Draw something for the bookseller in the wet cement.
Try to listen to the other guest's phone conversation.
Take all the photos you can with the telescope.
Try to call a number from one of the previous games at the Academy of Music.
Find all the photos in the Roze's home.
Report Leni… then try to justify your actions years later.
Achieve all your secondary goals.