Quick answer: Free cold case murder mystery games give you the full file of an unsolved crime (police reports, witness statements, phone records, photos) and ask you to name the killer from the evidence alone. You can start in the browser with no sign-up: The Glass House on Forgotten Mystery, Static on Channel Nine on ColdCaseOnline and Last Call at the Bluebird on Unsolved Murder Mystery are all free, and they work for one detective, a couple or a group.
Picture this (a made-up but familiar scene): It is Friday night and two people share one laptop on the couch. One reads the bartender's statement out loud: he locked up at eleven. The other scrolls to the register tape and stops. The last sale rang through at 11:41. Nobody speaks for a second, then both start talking at once. That is the moment these games are built for.
Key takeaways
- A cold case game is a reading and reasoning game. The fun is catching two documents that cannot both be true.
- Each of the five sites below has a free unsolved case you can open in the browser without an account.
- Pick by headcount: solo players want pacing, couples want one shared file, groups want evidence in every hand.
- Online cases start in a minute. Printable PDFs turn the table into an evidence board.
What is a cold case murder mystery game?
A cold case murder mystery game is a fictional unsolved murder that you investigate yourself, using the kind of paperwork a real detective would inherit. There is no board, no dice and no script to perform. You read, compare, build a timeline, and when you are sure, you accuse.
That makes it different from a murder mystery party, where guests play characters. Here everyone sits on the same side of the table, and the only opponent is the lie you have not spotted yet. Our guide to cold case games online covers the formats in more depth.
Which cold case murder mystery games are free?
These unsolved cases are free to play online, in the browser, with no account:
- The Glass House (Forgotten Mystery): a celebrated architect falls three stories from the gallery of his own glass house. Accident, or not?
- Static on Channel Nine (ColdCaseOnline): 26 documents and six suspects, played solo or in a room with friends.
- Last Call at the Bluebird (Unsolved Murder Mystery): a complete police file, from first report to press clippings.
- The Last Curtain Call (Murder Mystery Time): a full case with suspects, evidence, interrogation and crime scene.
- Last Departure, Room 312 and The Orchard (Cold Murder Mystery): every case on this site is free, solution included.
Where can you play unsolved detective cases?
These five sites are good places to play, and each one is built around a different way of opening a case.
Forgotten Mystery: story-led cases online and in print
Forgotten Mystery, the site you are reading, is the place to start. Each online case runs in seven stages, from the case file and crime scene through witness statements, forensic evidence, intercepted messages and interrogations to the accusation. You get one accusation, so every clue matters.
Prefer paper? Our printable cold case PDFs, such as Dead Signal, The Last Encore, Unlisted and Last Reel at the Orpheum, are full investigations with police reports, statements, receipts, phone records, six suspects and sealed envelopes. The solution waits in the last envelope. Print at home in US Letter or A4.
Murder Mystery Time: a detective game in your browser
Murder Mystery Time is an online murder mystery game with no download and no app. You investigate crime scenes, question suspects and study evidence, and its free case includes every feature of the full game. The site also offers printable cases to play at home.
ColdCaseOnline: a live room with friends
ColdCaseOnline is played entirely in the browser, on a phone, tablet or desktop. Open a case alone, or create a room for up to eight players and share the code. If the host owns a case, everyone who joins the room plays it free.
Unsolved Murder Mystery: the complete police file
Unsolved Murder Mystery hands you the whole file of a fictional unsolved case. Read it alone or in a private room where each friend reads on their own phone, with text chat built in. Every case, including the free one, also comes as a printable PDF with the solution sealed separately.
Cold Murder Mystery: every case free
Cold Murder Mystery is free from the first page to the sealed solution envelopes, with no download, no account and no payment. It is the easiest way to find out whether you enjoy the genre, in English, German or French.
Cold case games compared
| Site | How you play | Free to play | Best for |
|---|---|---|---|
| Forgotten Mystery | Staged online cases, printable PDFs | The Glass House | Solo players and couples who like a story |
| Murder Mystery Time | Online detective game, printable cases | The Last Curtain Call | Players who want to question suspects |
| ColdCaseOnline | Browser case, solo or in a room | Static on Channel Nine | Friends playing from different places |
| Unsolved Murder Mystery | Full police file online or as a PDF | Last Call at the Bluebird | Readers who want every document |
| Cold Murder Mystery | Browser cases | Every case | First-time detectives |
Should you play online or print the case?
Play online when you want to start tonight, and print when you want the table covered in evidence. The two formats feel different even when the mystery is the same kind.
- Online: nothing to prepare, works on a phone, tablet or computer, and friends in other cities can join the same room. Good for a spontaneous night.
- Printable PDF: you can spread pages out, pin them to a wall, write in the margins and pass documents across the table. Good for a planned evening, a gift or a weekend away with no screens.
How do you pick a case for solo, couples or groups?
Choose by how many people will read at the same time, because that decides whether the evening feels focused or crowded.
Solo
A solo detective needs structure, since nobody is there to say "wait, go back." Pick a case that opens in stages and keep a notebook of times and names.
Couples
Two readers is the sweet spot. One takes the statements, the other takes the records, then you trade findings. Disagreeing helps: each of you has to prove a suspect from the page. Agree on one rule before you start, which is that nobody opens the solution until both of you have named a killer.
Groups
A group works when every player holds evidence of their own. Use a shared online room where each person reads on their own phone, or deal the printed pages around the table. Have one person keep the timeline, and vote before the reveal.
What if you want a murder mystery party instead?
Choose a murder mystery party kit when the evening is about the guests as much as the puzzle. A cold case puts everyone on the same side of the table. A party kit does the opposite: every guest plays a character with a secret, and one of them is the murderer.
Our printable murder mystery party kits are written for 4 to 20 guests and run about one and a half to two and a half hours. One purchase includes the same case in three sizes, so you do not have to guess the headcount in advance:
- Mini: 4 to 6 guests, a dinner table.
- Classic: 6 to 9 guests, a living room.
- Grand: 10 to 20 guests, a real party.
Each character gets a public page that everyone may hear, a secret page to protect, personal goals to chase and a clue page for every round. Evidence cards come out step by step. The host runs the night with a narration script, scoring and awards, and keeps the solution in a separate file until the final vote.
The settings are built for dressing up. Murder at the Midnight Show takes place in a Las Vegas showroom in 1963, where the man who runs the dinner show is found dead above the main floor. Murder on the SS Aurelia is set on the last night of an ocean liner's crossing to New York in 1955, with a missing sapphire and two killers aboard.
Which should you pick? Use this rule of thumb:
- Guests who love reading evidence and arguing over timelines will enjoy a cold case more.
- Guests who love costumes, accents and accusing each other across the table will enjoy a party kit more.
- A mixed crowd usually prefers the party kit, because nobody has to read for long and everyone has a role from the first minute.
Print the pages a day ahead and send each guest a character before the party. Every file comes in full colour and in a printer-friendly design.
How do you solve a cold case, step by step?
You solve a cold case by turning a pile of documents into one timeline and then testing every suspect against it.
- Read the opening report twice. It fixes the victim, the place and the time window everything else hangs on.
- List the suspects. For each one, note where they say they were and who can confirm it.
- Build the timeline. Put every stamped time in order: calls, receipts, door logs, sightings.
- Look for the clash. Find the statement that a record contradicts. That gap is usually where the case opens.
- Check motive and means last. Plenty of people had a reason. Only one had the reason, the chance and the lie.
- Accuse once. Say the name, then the proof, before you open the solution.
FAQ
Are there free cold case murder mystery games online?
Yes. The Glass House, Static on Channel Nine, Last Call at the Bluebird and The Last Curtain Call are free to play in the browser, and every case on Cold Murder Mystery is free.
What is an unsolved murder mystery game?
It is a fictional murder presented as an open investigation, where you study the evidence and name the killer yourself. Nothing is acted out; the whole game is reading and reasoning.
Can you play a cold case game alone?
Yes, cold case games work very well for one player. Choose a case that reveals evidence in stages and keep notes as you go.
Are cold case games good for date night?
Yes, two players is one of the best ways to play. Split the documents, compare what you found, and argue your suspect from the evidence.
Can you print a cold case and play at home?
Yes. A printable cold case PDF contains the whole investigation, with the solution sealed separately. Print it, sort the pages and open the envelopes in order.
How long does a cold case murder mystery game take?
It depends on the format. A staged online case on Forgotten Mystery takes about 20 to 45 minutes, while a complete police file or a printable cold case takes two to three hours. You can pause an online case or leave a printed one on the table and come back the next day.
Are these cases based on real crimes?
No, the cases on these sites are fictional. They are written to feel like real investigations, but the victims, suspects and places are invented.