Plot: J.B. Harold Murder Club, known as J.B. Harold no Jikenbo #1: Murder Club in Japan, is a 1986 murder mystery adventure game, developed by Riverhillsoft and released for the NEC PC-98, MSX, MS-DOS, NEC TurboGrafx-CD and Nintendo DS platforms. Wikipedia
Plot: Portopia Renzoku Satsujin Jiken, often translated to The Portopia Serial Murder Case in English, is an adventure game designed by Yuji Horii and published by Enix. Wikipedia
Plot: Wizard and the Princess is a graphic adventure game written for the Apple II and published in 1980 by On-Line Systems. It was the second title released in the Hi-Res Adventures series after Mystery House. While Mystery House used monochrome drawings, Wizard and the Princess added color. Wikipedia