The list
1 Perdify
Best on iPhone — and the only one with voice
Perdify is a single-player murder mystery where you interrogate a cast of AI suspects — by text or out loud with your voice — across hand-authored cases of four to nine suspects. Suspects improvise, remember what you already asked, and crack under pressure, while the game tracks the contradictions for you. Disclosure: we built it. Its edge over everything else here is that it is a native iOS app with real voice interrogation and authored cases — not browser-only, PC-only, or randomly generated. If you mostly play on your phone, it is the most complete option on this list.
Get Perdify free→ 2 Arsenic
Best free pick, instant in your browser
A free browser whodunit: Lord Ashworth is poisoned at his 1927 manor and you grill six AI suspects to name the killer, the motive, and the method. There is no download and almost no friction — the suspects lie, dodge, and contradict themselves differently on each run. The catch is that it is a single case, text-only, and there is no app to take with you.
Visit Arsenic →
3 Vaudeville
Best full AI detective story on PC
One of the earliest "talk to the AI suspects" detective games, Vaudeville casts you as Detective Martini in a noir town with around a dozen characters, nine locations, and multiple endings — and you can question people by typing or by speaking into your mic. Honest caveat: its Steam reviews sit at "Mixed," with recurring complaints about stiff AI voices and slow replies. It is PC-only and a one-time purchase.
Visit Vaudeville →
4 Krimi
Best for endless, never-repeating cases
Krimi generates a fresh case every time, so you never run out: read the file, interrogate the AI suspects, catch the lies, and climb a global solve-rate leaderboard. It runs on iPhone and in the browser. The trade-off is that it is text-only and, because cases are AI-generated rather than authored, they can start to feel samey over long sessions.
Visit Krimi →
5 DETECTIVE.OS
Best for customizable cases
A browser detective game where AI builds each case in real time and you ask suspects anything in free text — no dialogue trees. Its standout is control: you choose the setting, the number of suspects, and the difficulty before you start. It is web-only with no native app, and it runs on a credits-and-subscription model.
Visit DETECTIVE.OS →
6 Shadows of Doubt
Best detective sandbox (if depth beats conversation)
The most acclaimed detective game here ("Very Positive" on Steam) — a voxel immersive sim set in a fully simulated city where you do real legwork: trace call logs, tail suspects, lift fingerprints, and break into apartments. Important honesty note: its "AI" is the simulated world, not chatty LLM characters, and its dialogue is menu-based. Pick it if systemic depth matters more than actually talking to suspects.
Visit Shadows of Doubt →
7 mysterygames.ai
Best for a group game night
Not a solo game at all: AI writes a custom party mystery and acts as host for four to eight players, each on their own phone, so nobody has to run the night. You pay per session. You are role-playing with your friends rather than interrogating AI suspects — a completely different experience from the rest of this list, but the best choice if you want a group activity.
Visit mysterygames.ai →
FAQ
What is an AI murder mystery game?
An AI murder mystery game is a detective game where you solve a crime by talking to characters powered by AI. Instead of picking from a fixed menu of questions, you ask suspects whatever you want in your own words; they answer in character, improvise, and can lie or contradict themselves. The best ones, like Perdify, let you interrogate the suspects and then accuse the killer.
What is the best AI murder mystery game for iPhone?
For iPhone specifically, Perdify is the most complete option: it is a native iOS app, it is free to play, the cases are hand-authored, and it is the only one that lets you interrogate suspects with your voice as well as by text. Krimi is a strong iPhone alternative if you prefer endless AI-generated cases over authored ones.
Are there any free AI murder mystery games?
Yes. Perdify is free to play on iPhone and iPad, and Arsenic is free to play in any web browser. Several others, such as Krimi and DETECTIVE.OS, are freemium — free to start, with subscriptions or credits for more cases.
Can you talk to the AI suspects out loud with your voice?
On mobile, Perdify is currently the only AI murder mystery game that supports real voice interrogation alongside text. On PC, Vaudeville also lets you speak to suspects through your microphone. Most other AI mystery games are text-only.
Are the cases authored or AI-generated, and does it matter?
Both approaches exist. Krimi and DETECTIVE.OS generate each case with AI, which means endless variety but cases that can feel repetitive. Perdify uses hand-authored cases with designed suspects, evidence, and contradictions, which tends to produce tighter, more satisfying mysteries with a real solution to uncover.
Are these the same as multiplayer games like Among Us?
No. Social-deduction party games like Among Us are multiplayer and you read other human players. The games on this list are mostly single-player: the lying is done by AI characters you question one on one. mysterygames.ai is the exception here — it is an AI-hosted party game for a group.