Full list of all 24 Family Mysteries: Poisonous Promises achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Find all Morphing Items.
Find all Collectibles.
Finish all the Minigames without skipping any.
Capture the main criminal.
Perform all the Evidence analyses.
Collect all Evidence.
Rescue Duke.
Capture the henchmen.
Drive a speedboat.
Complete a Hidden Object Puzzle without a mistake.
Finish all the Deduction Scenes.
Finish three Hidden Object Puzzles in less than ten minutes.
Play through the first hour of the game without skipping any cutscenes.
Perform three Evidence analyses.
Finish your first Deduction Scene.
Finish three Hidden Object Puzzles without a Hint.
Complete 5 Minigames without skipping any.
Find three Hidden Objects within three seconds.
Perform your first Evidence analysis.
Complete a Minigame in less than a minute.
Complete a Hidden Object Puzzle without a Hint.
Complete a Hidden Object Puzzle in less than a minute.
Find one Morphing Item.
Find one Collectible.