01 — The Library
Open a Case File
Start from the lobby, where active investigations and fresh cases sit side by side. Pick up where you left off or spend credits to open a new mystery.
PERDIFY AI Murder Mystery Interrogation Game for iPhone TRUST NO ONE
Question AI suspects by text or voice — and force a confession.
One of them is lying. All of them seem guilty. Only your instincts can save you.
Free to play. Credits open each case.
DESCEND
The Premise
You step into the room. Strangers stare back. Each claims innocence. One is lying. Someone here has blood on their hands—and they'll say anything to keep it hidden.
In PERDIFY, you are the interrogator, the detective, the final judge. Each suspect speaks with their own voice. They remember your questions. They adjust their stories. They watch you watching them.
Your weapon is conversation. Your evidence is contradiction. The killer knows you're hunting them. They're hunting you too.
Can you find the liar before the game finds its next victim?
THE MECHANICS OF PARANOIA
Case File · Confidential
The Investigation
Eight steps from the door to the confession. None of them are easy.
02 — The Cases
Choose Your Investigation
Quick Cases close in a single sitting. Full Cases run longer, with progress saved between sessions. Every file is built around motives, access, alibis, and one guilty answer.
03 — The Cast
One of Them Is Lying
Six to nine suspects, each with a face, a role, and something to hide. One of them did it. The rest may still be lying about everything else.
04 — Interrogation
Talk to Them. Out Loud.
Question suspects by voice or text. Choose your tone, press the weak spots, and listen for how the answer changes when the pressure rises.
05 — The Answers
Read Between the Lines
Every reply becomes part of the case record. Compare what suspects say now against what they said earlier, and pull contradictions into the open.
06 — The Case File
Examine Every Clue
Bodies, objects, statements, alibis. Examine each piece, log it, and cross-reference it against the stories you have been told. Your case is built from contradictions, not hunches.
07 — The Scene
Every Room Is a Lead
Search rooms, restricted spaces, and the crime scene itself. Who had access? Who had a reason to be there? The location record keeps the physical timeline honest.
08 — The Verdict
Make the Call
Limited rounds. Limited questions. A handful of accusations and no take-backs. Name the culprit, back it with evidence, and live with the call.
Open Cases
Choose the room that lies back.
Every case starts with a public brief, a closed circle, and enough pressure to make the wrong story sound almost true.
Full Case Multi-session
Rebuild the night floor by floor before the hotel writes its own story.
Preview Case
Full Case Multi-session
Follow the files, the keys, and the grudges left by the old regime.
Preview Case
Quick Case Single sitting
Fit every movement inside the narrowest corridor on the train.
Preview Case
Quick Case Single sitting
Listen for what the recorder caught after confession ended.
Preview Case
Quick Case Single sitting
Use silence, sensors, and timing to break a sealed-station alibi.
Preview Case
Full Case Multi-session
Pressure a luxury wellness ritual until the calm starts to crack.
Preview Case
Full Case Multi-session
Test every story against the dust, the doors, and the storm outside.
Preview Case
Quick Case Single sitting
Trace the last drink through a tight circle before midnight becomes an alibi.
Preview Case
Full Case Multi-session
Separate manners from motive before the household closes ranks.
Preview Case Quick Case Single sitting
Use recordings, route clues, and alibis to find who turned the sky machine into a murder weapon.
Preview Case Quick Case Single sitting
Reconcile scanner logs, safety overrides, and oxygen custody before the lockdown lifts.
Preview Case Case Progress
The pressure stays on.
Work through each case across rounds of interrogation, evidence review, and accusation. Your progress is saved, your questions are limited, and every exchange becomes part of the investigation record.
You are not just reading clues. You are deciding who to pressure, what to ask next, and when the case is strong enough to name the imposter.
Fair-play AI
The AI improvises dialogue, not the truth.
PERDIFY cases are built around an authored mystery model. The suspect can deflect, hesitate, and lie in character, but the case facts stay anchored to the same evidence graph the player is trying to solve.
See the validation modelThe solution is not improvised
Each release case has a fixed truth model for the timeline, locations, alibis, evidence links, and character knowledge. The AI performs the suspect. It does not invent who did it.
Characters answer from case facts
Suspects receive role, schedule, allowed-claim, known-character, known-location, and available-evidence context. Player assertions are treated as reliable only when they match that authored context.
Cases are checked before release
The June 18, 2026 scenario QA snapshot shows 0 blocking errors and 9 tracked warnings. The detail page shows the per-case breakdown.
"In a room full of liars, the truth is just another suspect."
The Game Has Already Started
Someone in that room knows what you're capable of. Prove them right.
Support
Questions, account help, and bug reports
Use this form to reach PERDIFY support for gameplay questions, technical issues, purchases, account access, account deletion, privacy requests, or safety concerns. You can also email support@perdify.com.
For AI character misuse, explicit content attempts, or abuse reports, read the Safety and Content Policy and choose the safety topic below. Common purchase, voice, deletion, and restore questions are covered in the FAQ.
We review support requests and reply by email.