Detective Conan: The Suspicious Gorgeous Train
From Detective Conan Wiki
The Suspicious Gorgeous Train is a game for the Game Boy, and the second Game Boy game in the series. In this game, you play as Conan, and you, Ran, Kogoro, The Detective Boys, and Heiji Hattori are all on a train where a man is found hanging in one of the rooms. At first it is believed to be suicide, but later it is discovered that it was definitely a murder. Can Conan solve the case with help from friends?