Here is the full list of all 13 Lost Grimoires: Stolen Kingdom achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Find all Kestrel symbols.
Finish the game.
Finish all Minigames without skipping.
Finish all Hidden Object Puzzles without using hints.
Finish any Hidden Object Puzzle in less than 1 minute.
Finish 6 Hidden Object Puzzles in a row without using hints.
Find half of the Kestrel symbols.
Find 3 hidden objects within 3 seconds.
Play through the first hour of the game without skipping cutscenes.
Finish 4 Minigames in a row without skipping.
Finish any Minigame in less than 1 minute.
Finish any Hidden Object Puzzle with less than 4 mistaps.
Find one Kestrel symbol.