Yes No Detective is a deduction game built around a simple challenge: uncover the truth by asking questions that can be answered only with “yes” or “no.” Players interrogate the Keeper, using each response to narrow down possibilities and solve the story in as few questions as they can. The game presents itself as a detective experience focused on careful reasoning, investigation, and efficient questioning.

Players can start a new game, continue an existing one, or join a room. The interface also includes notices and settings, with navigation designed for keyboard use. Yes No Detective is available in Korean and English, making the experience accessible in either language. Players can optionally back up their progress through Google and choose whether to receive email updates about the game.

The site notes that its verdicts, hints, and artwork are AI-generated, and that its stories are made with AI tools. With its question-based format and emphasis on reaching a conclusion, Yes No Detective offers a distinct, interactive way to engage with mystery-solving.