Being the first game to be released inspired by the manga Detective conan or "Meitantei Conan" in Japanese. written and drawn by Gōshō Aoyama, was entitled to its first game on Game Boy named Meitantei Conan: Chika Yuuenchi Satsujin Jiken, developed by Act Japan and published by Bandai, which was released in Japan in 1996.

Case closed tells the story of an amateur high school detective, Shinichi Kudo. Members of the mysterious Men in Black organization poison him after he interferes in their affairs. The poison does not have the desired effect, and Shinichi is transformed into a little boy.He then takes the alias Conan Edogawa and continues his investigations by being adopted by a lousy private detective, Kogoro Mouri accompanied by his daughter Ran Mouri.