Here is the full list of all 20 New York Mysteries: Secrets of the Mafia achievements.
Completed the main and bonus chapters without skipping mini-games.
Completed the main and bonus chapters without using hints in hidden object scenes.
Completed the main and bonus chapters without skipping dialogs or movies.
Completed the spot the difference mini-game without making a mistake.
Completed the main chapter on Hard mode.
Collected all the phantom objects.
Completed all collections.
Completed the casino chip collection.
Completed the tie collection.
Completed the statue of liberty collection.
Arranged the books showing the presidents' portraits in chronological order.
Completed the symbol plates mini-game without excess clicks.
Found 3 items in 3 seconds in a hidden object scene.
Completed a mini-game in more than 5 minutes.
Clicked more than three times in one second in a hidden object scene.
Completed the briefcase collection.
Completed a trip in the underground city.
Completed a hidden object scene without random clicks.
Completed 3 mini-games in a row without using the Skip button.
Completed a mini-game in less than a minute.