Here is the full list of all 13 Scarlett Mysteries: Cursed Child achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Finish the game.
Finish all the Minigames without skipping.
Find all of the Father Traces.
Finish all the Hidden Object Puzzles without using any hints.
Discover all the visions.
Find half of the Father Traces.
Finish any Hidden Object Puzzle with less than 4 mistakes.
Finish any Hidden Object Puzzle in less than 1 minute.
Find 3 Hidden Objects within 3 seconds.
Play through the first hour of the game without skipping any cutscenes.
Finish any Minigame in less than 1 minute.
Finish 4 Minigames in a row without skipping.
Find one Father Trace.