Free Online Detective Game
Become a detective
In The Lone Detective you are in charge of the investigation, whether it is a murder case, missing person or other unsolved cases, your goal is simple - find the solution to that mystery.
Murder mystery game
Each casefile usually contains reports, testimonies and evidence - all you need to solve the mystery. Sift through the data and use reasoning to spot what is important and what is just a red herring.
Find the killer - your way
Follow motives, reconstruct events, connect contradictions or dig through the files to uncover the missing bit. No matter what way you approach is, every mystery has the same goal.
What is The Lone Detective?
The Lone Detective is a free online detective game where you take on unsolved cases and try to uncover the killer. Each casefile is unique, set in different places and time periods, you will be challenged to piece together the truth from evidence, testimonies and reports.
Everything you need is there, but each casefile also contains some gaps, which can only be filled through logical reasoning and careful deduction.
What is logical reasoning?
Logical reasoning is a method of drawing conclusions from the information you have. It means looking at facts, clues and statements put in front of you, and deciding which fit a logical pattern or theory. Instead of guessing, you follow a chain of cause and effect, checking whether each step makes sense.
User reviews
Average user reviews from last 30 days.
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4.57 / 5.00
Recent user reviews
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The Lens of the Beholder
by jesscuevas1295@gmail.com
★★★★★
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The Lens of the Beholder
by Yvonne
★★★★★
★★★★★
The Lens of the Beholder
by khouloud
Frequently Asked Questions
Do I need an account to play?
Yes, you do. Otherwise we won't be able to contact you regarding your solution or provide further clues.
What skills do I need to solve a case?
The game requires reading, a bit of writing and a bit of logical thinking. Some cases might require just spotting one detail, others will require some thinking outside the box to build the correct theory.
How long does it take to solve a case?
The short cases can be solved within 10-15 minutes, full cases will take longer, especially on higher difficulty levels. But the good news is, there are no time limitations - you can have as much time and as many goes as you want.
Is the game realistic?
All cases are fictional, even if inspired by true events. The Lone Detective is more a puzzle game or brain-teaser than "police-procedural simulator" - you won't solve cases by just finding the right evidence, you'll need to put your good old brain to work to fill the gaps in the stories.
Do all cases have only one correct solution?
No, due to the speculative nature of the game, there are cases that can have more than one acceptable solution. If you can build an airtight theory we won't be able to disprove using the content of the casefile, it will be accepted as a correct one.
Recent blog posts
2026-06-07
2026-04-22
2026-02-24
One clue is enough, if you can spot the right one
Pay attention to details, the truth can sometimes be buried in plain sight.
What kind of cases you will face?
Right now there are 3 main types of cases in The Lone Detective, the difference between them is the content of the casefiles.
Cold cases
In cold cases, all the evidence have already been gathered by the original investigators, all you have to do is find a detail they missed and point out the killer.
Cold case file usually contains:
- police report
- original investigator notes
- coroner's report
- crime scene plan or its description
- testimonies
- evidence
Open cases
In open cases, most of the evidence have already been gathered by the original investigators, but there are still details that need to be uncovered through lab tests or queries to the archives to build the whole theory.
Open case file usually contains:
- police report
- coroner's report
- crime scene plan or its description
- testimonies
- known evidence
- access to lab reports or an archive
Short cases
With only a handful of clues, you’ll need to connect the dots yourself and construct a theory that explains what really happened, even when the casefile clearly leaves gaps in the story.
Short case file usually contains:
- case summary
- list of suspects
- handful of evidence
Uncover the motive to find the killer
Understand the "why", and the "who" will become inevitable.
Recent unsolved cases
The Fleeting Fortune
An 18-year-old man dies in a suspicious car crash just two days after becoming a millionaire. The police have no doubt that is not a coincidence.
This is a short case file, which means is contains just case summary and list of suspects, all you have to do is tell whodunnit. Oh yeah, and why!
The Halloween Murder Mystery
In late October 1967, a yacht with all passengers unconscious aboard was found near a small island 30 kilometres from Sicily. When the Coast Guard arrived at the scene, they found one of the passengers dead.
This is a cold case file, which means all the evidence have been already gathered, all you have to do is solve the mystery.
The Abrupt Death of Sir Arthur
In 1898, British explorer Sir Arthur Jones was found dead in his hotel room after returning from an expedition through the plains of East Africa. Someone left him mortally wounded, ransacked the room and left without being spotted by anyone.
This is a cold case file, which means all the evidence have been already gathered, all you have to do is solve the mystery.
Hollywood Seven
A young woman is found dead in a motel room. The cheap, run-down Hollywood Seven, just outside Sunset Boulevard in Los Angeles, was her last stop on the way to becoming a star in Hollywood. But just like many people before, all that was awaiting her were disappointments and regrets. And untimely death.
This is a short case file, which means is contains just case summary and list of suspects, all you have to do is tell whodunnit. Oh yeah, and why!
No victim is random in this game
Look at the whole picture, not just the crime - the answer is there.
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