The ABC Murders is a mystery-themed puzzle game based on the novel of the same name by legendary author Agatha Christie. Taking on the role of detective Hercule Poirot, you'll search crime scenes, unlock puzzle boxes and -- in an interesting integration of puzzle and investigation gameplay -- fit clues into a diagram to reveal the outline of the crime. Some of the puzzles are a little simple, thanks to highlighting that reveals crucial clues, but the game is charmingly presented.