Here is the full list of all 23 Family Mysteries: Poisonous Promises achievements worth 1,000 gamerscore.
Capture the main criminal.
Finish all the Minigames without skipping any.
Find all Collectibles.
Find all Morphing Items.
Perform all the Evidence analyses.
Collect all Evidence.
Rescue Duke.
Capture the henchmen.
Drive a speedboat.
Finish all the Deduction Scenes.
Perform three Evidence analyses.
Finish your first Deduction Scene.
Complete a Hidden Object Puzzle in less than a minute.
Complete a Hidden Object Puzzle without a mistake.
Complete 5 Minigames without skipping any.
Finish three Hidden Object Puzzles in less than ten minutes.
Finish three Hidden Object Puzzles without a Hint.
Perform your first Evidence analysis.
Complete a Minigame in less than a minute.
Find one Morphing Item.
Find three Hidden Objects within three seconds.
Find one Collectible.
Complete a Hidden Object Puzzle without a Hint.