Here is the full list of all 16 Skyland: Heart of the Mountain achievements.
Finish the final Fight Puzzle without using Skip.
Find all the Collectibles.
Seek those who climb high.
Finish all the Hidden Object Puzzles without using Hint.
Finish Bal's Diary Puzzle without using Skip.
Extinguish all the fires.
Find half of the Collectibles.
Save the seer.
Finish a Puzzle in less than 30 seconds.
Finish 3 Hidden Object Puzzles without using hint.
Complete 3 Minigames without a Skip.
Finish a Hidden Object Puzzle with less than 3 mistakes.
Find the first Collectible.
Finish a Fight Puzzle without using Skip.
Win the fight against the first drone.
Finish a Hidden Object Puzzle in less than 20 seconds.