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.
Discover all the visions.
Find 3 Hidden Objects within 3 seconds.
Play through the first hour of the game without skipping any cutscenes.
Finish any Hidden Object Puzzle in less than 1 minute.
Finish 4 Minigames in a row without skipping.
Find one Father Trace.
Finish any Minigame in less than 1 minute.
Find half of the Father Traces.
Find all of the Father Traces.
Finish any Hidden Object Puzzle with less than 4 mistakes.
Finish all the Hidden Object Puzzles without using any hints.