Hidden Investigation: Who Did It is a detective game that requires thinking and dialogue. The famous police detective Sarah is investigating another unsolvable case. When the lovely Miss Monroe was reported missing, the chief of police appointed Sarah as a detective to investigate the case. Your task is to solve this case and find the hidden murderer. In the game, you must look for clues in various scenes and talk with interesting characters to gain a deeper understanding of the case. When you find the kidnapper and Miss Monroe, don't hesitate to kill the kidnapper and rescue Monroe!