Here is the full list of all 16 Picross Fairytale achievements.
All Trophies collected
Castle world complete
50 hints used
All mini-games complete
All keys collected
Mountain world complete
World completed without hints
Earned 100.000 coins
Lake world complete
"Solved in less, then 60 seconds"
Forest world complete
20 hints bought
Hamlet world complete
Mini-game complete
Tutorial finished
3 levels in raw without hints