Cold Case OnlineOur sister site · Online murder mystery gameColdCaseOnline.com|Play the same cold case file with your friends in real time. 2–8 players.Our sister site: play a case file live with friends, 2–8 playersPlay the free case →Play free
Murder mystery detective scene
· CRIME SCENE · DO NOT CROSS · CRIME SCENE · DO NOT CROSS · CRIME SCENE · DO NOT CROSS · CRIME SCENE · DO NOT CROSS · CRIME SCENE · DO NOT CROSS ·
· CASE FILE CLASSIFIED · EVIDENCE · CASE FILE CLASSIFIED · EVIDENCE · CASE FILE CLASSIFIED · EVIDENCE · CASE FILE CLASSIFIED · EVIDENCE ·
Unsolved
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🔪 Play Free Online · No Download

The Cold Case Murder Mystery Game

Open cold case files, study the evidence, interrogate suspects, and uncover the truth hidden behind every alibi. One careful detective. One inevitable killer.

🗂️ Cases inspired by real crime files · Forensic reports, witness statements, interrogations

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Welcome to the ultimate murder mystery game online. Our unsolved case files put you in the shoes of a real detective — examine crime scenes, study mystery case files, analyze evidence, and interrogate suspects. Unlike simple murder games, each of our detective games features a complete investigation with forensic reports, witness statements, and intercepted messages. Whether you love true crime games or classic whodunit puzzles, our free mystery games deliver the thrill of solving real case files from your browser.

How To Play

Solve the Murder in Three Steps

01
CLASSIFIED

Open the Case File

Read the crime scene report, autopsy findings, and witness statements carefully.

02

Analyze the Evidence

Forensic reports, phone records, security cameras — every clue is critical.

03
⚠ ONE CHANCE

Catch the Killer

You get one shot. Accuse the wrong person and the killer walks free. No second chances.

Mystery Case Files

Unsolved Case Files — Play Detective Games Free

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FAQ

Frequently Asked Questions

What is a murder mystery game?
A murder mystery game is an interactive detective puzzle where you play as an investigator solving a fictional murder. You examine crime scene reports, analyze forensic evidence, interrogate suspects, and try to identify the killer. Our online murder mystery game includes detailed dossiers, witness statements, phone records, and forensic reports across a growing library of case files, with new cases added regularly.
Are these unsolved case files free to play?
Yes! We offer a free unsolved case file that you can play immediately — no sign-up or credit card required. Our premium membership ($12.49/month or $42/year) unlocks all mystery case files — including harder investigations with more complex evidence and deeper storylines.
How do online detective games work?
Our detective games run entirely in your browser — no downloads needed. Each case has 7 investigation stages: read the case file dossier, study the crime scene, review witness statements, examine forensic evidence, read intercepted messages, interrogate suspects, and finally name the killer. You only get one chance to accuse, so every clue matters!
Can I play murder mystery games on my phone?
Absolutely! Our murder mystery games are fully responsive and work on any device — phone, tablet, or desktop. The entire murder game runs in your browser, so you can investigate case files wherever you are. Your progress is saved automatically.
What are mystery case files?
Mystery case files are complete detective investigations packaged as interactive documents. Unlike static PDF case files, our online mystery case files let you click through evidence, interrogate suspects with branching questions, and get scored on your deduction skills. Each case file includes a crime scene, forensic reports, suspect profiles, and a final accusation round.
How many murder games are available?
We have a growing collection of murder games ranging from Easy to Hard difficulty, with new cases added regularly. One case is completely free. Premium members get instant access to all current and future unsolved case files. Each case takes 20-45 minutes to solve, depending on how thoroughly you investigate.
Is this a true crime game?
Our game is inspired by true crime storytelling but all cases are 100% fictional. If you enjoy true crime games, you'll love our realistic murder investigations with detailed forensic evidence, witness testimonies, and plot twists. No real people or events are referenced — it's pure detective fiction designed for puzzle lovers.
What makes this different from other mystery games?
Unlike simple trivia or escape room mystery games, our platform features full-length detective investigations. Each case has a rich narrative, multiple suspects with realistic motives, detailed forensic reports, and interrogation sessions. You also only get ONE chance to name the killer — making it the most intense murder mystery game experience online.
Is this suitable for kids or family game nights?
Our mystery games are designed for teens and adults (13+). The cases involve fictional murders but contain no graphic violence or disturbing imagery. They're great for family detective game nights — you can work together to analyze clues and debate who the killer is before making your final accusation.
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Mystery Case Files

Cold Case Files — Play Murder Mystery Games Free

Browse all our murder mystery game case files below. Each unsolved case file is a complete detective investigation with crime scenes, forensic evidence, suspect interrogations, and a final accusation. Start with our 1 free mystery case file, or unlock all cases with a premium membership.

One case is free. All other cases need a membership ($12.49 per month or $42 per year, cancel any time). Printable PDFs are sold separately.

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Detective's Blog

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Last updated: October 2026

1. Acceptance of Terms

By using ForgottenMystery.com ("the Service") or buying anything on it, you agree to these Terms of Service and to our Refund Policy and Privacy Policy. If you do not agree, do not use the Service.

2. What We Sell

Forgotten Mystery is an online detective game. All cases, characters and events are fictional. The Service offers three things:

Free case. One case in the Cases section can be played without paying.

Membership (subscription). A membership gives you online access to all cases in the Cases section of this website for as long as the membership is active. It does not include printable PDF files, and it does not include purchases made in our mobile apps.

Printable PDFs. Printable case files and escape room kits are sold separately as one-time purchases. Buying a printable does not give access to the online cases.

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All products are digital and are delivered immediately. A membership is delivered when premium access is switched on for your account, which happens within moments of a successful payment. A printable is delivered when the download button for that file becomes available in your account. We keep records of payments, of the consent given at checkout, and of access and downloads.

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Last updated: March 2026

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Your information is used to: provide and maintain the Service, manage your subscription, display your progress on leaderboards, and communicate important updates about the Service.

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Refund Policy

Last updated: October 2026

1. No Refunds on Digital Products

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