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