Here is the full list of all 26 Christmas Puzzle achievements.
Install the fur-tree illumination
Decorate the fur-tree
Complete episode 2
Score 10000 in a single level
Illuminate the pathway
Earn 500 Santavo coins
Install the bushes illuminations
Buy clothes for the snowman
Complete episode 1
Add more forest illuminations
Earn 250 Santavo coins.
Score 50000!
Fire 10 rockets!
Illuminate the forest
Explode 25 bombs!
Buy the illuminations for house.
Earn 100 Santavo coins.
Decorate the house.
Clean the pathway!
Make a snowman
Put some presents under the fur-tree
All levels complete
Prepare you mansion for Christmas
Earn 3 stars for every level.
Complete episode 3
Complete episode 4