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.
Finish the game.
Find all Kestrel symbols.
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 3 hidden objects within 3 seconds.
Find half of the Kestrel symbols.
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.