Here is the full list of all 13 Syberia achievements worth 1,000 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox 360.
Find all the game items
Finish the game
Finish the game in difficult mode in less than 6 hours
Talk with every character
Return to Aralbald and escape from the thief
Talk to Helena
Get the zeppelin off the ground with Boris' help
Arrive at the space station
Listen to all the cylinders in the train
Solve all the Barrockstadt University's problems
Find an Amerzone speaking book
Familiarize yourself with the Voralberg will
Finish preparing for your arrival in Valadilene