G-MODE Archive+ Detective Kyogoku Ryusuke Jiken Tan Vol.12 "The Client Who Doesn't Cry" is a mystery adventure game for Windows. The game is set in Marihama City in K Prefecture, where the player solves a series of difficult cases. The game is designed to be easy to play, even for beginners. The player controls the main character in the scenario and solves the mystery by selecting commands in the conversation and deduction parts and by gathering information and evidence that will serve as clues to solve the case.

In this game, a small client visits the Kibukawa Detective Agency with a request to save his friend. The case was initially handled by assistant detective Sagishima Izuna and scenario writer Ikurumi Masao. However, the case gradually changed its appearance and eventually developed into a horrific murder case. The game has a dark and suspenseful atmosphere, which adds to the overall experience.