Here is the full list of all 13 Syberia 2 achievements worth 1,000 gamerscore. It takes around 4-5 hours to unlock all of the achievements on Xbox 360.
Finish the game
Find Syberia
Witness Oscar's sacrifice
Talk with every character
Enter the dream
Use Boris's plane
Get a Youki friend
Take Hans to the Patriarch
Call everyone on the phone
Get Candyroff phone number
Read what happened to Helena Romanski
Find all the game items
Finish the game in difficult mode in less than 6 hours