Agatha Christie: Murder on the Orient Express stay as faithful to Christie's work and time era as possible. A major difference between "And Then There Were None" and "Murder on the Orient Express" that Sheldon pointed out was that in the former, the premise of the novel was that no one solved the murder. This forced Sheldon to desperately try to find a way to integrate clues into the story so that the player could actually discover the murderer, although the game remained quite uninteractive. In "Murder on the Orient Express", the actual novel follows an investigation, so Sheldon could more easily integrate clues to lead to
The Portopia Serial Murder Case and plot twists. The Famicom version also features a command menu system, point-and-click interface, and 3D dungeon maze. Upon its release, "The Portopia Serial Murder Case" was well received in Japan. It became an influential title and helped define the visual novel genre. "The Portopia Serial Murder Case" follows a first-person perspective and narrative. The various events are described with still pictures and text messages. The player interacts with the game using a verb-noun parser which requires typing precise commands with the keyboard. Finding the exact words to type is considered part of the riddles that must be solved. While