Voice driven murder mystery, Interview AI suspects with your voice
Hey HN! I'm excited to show off this really fun project I put together. I originally built this project 2-3 years ago, AI was already booming at the time, however voice AI agents were still very early. I loved my proof of concept at the time, but wasn't quite happy with it. I recently had the desire to check out the tech again, and know many of you will be interested. Interviews are speech to speech with OpenAI's gpt-realtime-2.1 over WebRTC. This model is... expensive, and because of that, I have to add some amount of restrictions, conversations are tied to a authenticated Clerk user id. I…
In plain words
WhoDunnitAI is an interactive murder mystery game where players use their voice to interrogate AI suspects at Blackwood Manor. Users speak directly to suspects via OpenAI's real-time voice AI, pressing them on alibis and catching contradictions to solve the case. The game is free to play, though the live voice interactions incur real costs, which players can help cover through optional donations. It's designed for anyone interested in detective-style puzzles and conversational AI experiences.
written from the facts on this page · September 2026
From the sources
Step into the interrogation room. Interview AI suspects with your own voice, catch their lies, and accuse the killer to their face. Solve the murder at Blackwood Manor — if you can.
Interviewing suspects, pressing them on their alibis, and catching the contradictions. WhoDunnitAI is free to play, but the live suspect voices run on gpt-realtime-2 — and every minute of interrogation costs real money. If you enjoyed the case, a donation of any size helps cover the AI bill and keeps the investigationfrom whodunnitai.com
In the maker’s words, at launch
Hey HN! I'm excited to show off this really fun project I put together. I originally built this project 2-3 years ago, AI was already booming at the time, however voice AI agents were still very early. I loved my proof of concept at the time, but wasn't quite happy with it. I recently had the desire to check out the tech again, and know many of you will be interested. Interviews are speech to speech with OpenAI's gpt-realtime-2.1 over WebRTC. This model is... expensive, and because of that, I have to add some amount of restrictions, conversations are tied to a authenticated Clerk user id. I have also added a 30 minute timer because well, I really don't want to go broke while I sleep tonight. Each suspect has a tool they call when you make a direct accusation. It captures who you accused and a faithful list of the evidence you actually stated. A separate gpt-5-mini judge then decides which of the case's required evidence facts you genuinely presented. Paraphrasing counts, vague suspicion and fishing don't. The rest is Next.js, MongoDB, and Clerk. Let me know whether the suspects hold up under a real interrogation.
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