Here is the full list of all 12 From Dust achievements worth 200 gamerscore. It takes around 10-12 hours to unlock all of the achievements on Xbox 360.
Complete all challenges, all territories, the Memory of the tribe and cover each map with vegetation
Complete every challenge
Complete the Memory of the tribe
Cover each territory with vegetation
Finish the story mode without losing more than 5 villages
Create a sanctuary for the tribe
Complete the Movements territory
Use the powers of the Breath 100 times
Absorb a massive amount of lava during the game
Uproot and replant 100 trees during the game
Complete the Wildfire territory
Create the Breath of the elements