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