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How a case plays, what it costs, and what to do when you're stuck. Something missing? Ask us.
A murder mystery game you play in your browser. Each case is a full police file: statements, scene photos, phones, inboxes, recordings and records. You read it, question the suspects, catch the lie and name the killer. Nobody tells you what to think.
Yes. Speak Now is a short case with four suspects and two lies to catch. You need a free account to play it, no card.
No. Everything runs in your web browser: nothing to install and nothing to print.
About 1½ to 2½ hours, depending on the case and how thorough you are. Your progress saves automatically, so you can split a case over two evenings.
Whichever story grabs you. Every case stands on its own: a poisoning at a snowbound castle feast, a museum heist, a death on an overnight train, a waitress missing from a roadside diner, and four more. For a first case we suggest The Vanishing: Medium, about 1½ hours, and it pulls you in from the first page. See all the cases
We rebuilt the whole investigation screen as a detective's desk: a case wall of leads, a file on every suspect with Means, Motive and Opportunity, a new interrogation room where you catch a lie on the exact line, forensic tools you handle like instruments, one notebook on every screen, and three desk themes. All eight cases play on it, and a case you already own opens on it with nothing to buy again.
The cases are about murder, so there are autopsy reports and crime scene photos. The game is about evidence, timelines and lies rather than shock, and it is meant for adults.
It is the same kind of game, a case file you work through to name the killer, but played in the browser: no box, no shipping and no subscription. Games like Hunt A Killer
Open a suspect in the interrogation room and choose what to ask. When an answer doesn't match the evidence, mark the exact line as a lie and show them the exhibit that proves it. Suspects dodge, change their story and sometimes crack.
Open a tip envelope. Every lead has sealed tips that you open in order: the first is a nudge toward the evidence you are missing, the last one spells the lead out. Tips point to evidence, never to the killer. Opened tips stay open, and the closing report counts how many you used.
When every lead on your case wall is closed, open File charges. Circle the person you are charging, tick how it was done, clip on the exhibits that prove it, and sign. Then the prosecutor reads your file.
The prosecutor sends the file back with a memo: either key findings are still missing, or the evidence doesn't support your account of who did it or how. Go back over the file and try again. Returned charges stay on the case record.
Yes. Many people play alone, but it works well together: share your screen on Discord or Zoom, or sign in to the same account on several computers and split the evidence. Clues you find are saved on the computer that found them, so agree on who keeps the notes. Playing as two? See the murder mystery game for couples.
No. This is not a party game where everyone plays a suspect. You are all the detectives and the game is the case file, so nobody has to know the answer in advance.
Not for a whole case yet. You can read the case file on a phone, but handing evidence in needs a computer, so play on a laptop or desktop. For a group, connect the laptop to the TV.
Any modern browser on a laptop or desktop computer. Nothing to install.
$7.99 for one case, $16.99 for any 3, or $35.99 for all 8. One-time payments, no subscription. See the options
No. Every option is a one-time payment, and the cases are yours to keep.
It unlocks every case in the library at the moment you buy it. New cases are sold separately when they come out. If you bought it before 5 October 2026, every future case is still included for you, as promised.
Yes. You can get all 8 cases ($35.99) at any time; it unlocks every case you don't own yet.
All payments go through Stripe's secure checkout. DetectiveOS never sees or stores your card details.
Because a case unlocks the moment you buy it, sales are final, except when something technical goes wrong. For a refund, contact us at support@detectiveos.net or use the link in your Stripe receipt. Payments in the Terms
Yes, so your cases are kept with you. You can create one at checkout or with the free case.
Yes, automatically, as you play. Your progress (notes, evidence you found, leads you closed) is saved in the browser on this computer, so you can close the tab and carry on later. Clearing your browser data removes it. Your purchases and solved cases are kept with your account.
Sign in and go to Contact, Get help, Delete my account, or email support@detectiveos.net from the address you signed up with. We delete your account and its personal data within 30 days and confirm by email. Purchases are not refunded when an account is deleted.
On the Contact page: suggest a feature, pitch a case or review one you played. We read everything.
Use the bug report on the Contact page, or email support@detectiveos.net with a screenshot and a short description.