Free Online Detective Games You Can Play in a Browser
Search for free online detective games and you'll find a lot of pages that exist mainly to show ads, many of them reposting the same small titles. So here's a shorter list. These six are games we could trace to their real source in November 2026, and each of them runs in a browser. They're very different from one another, so the useful question isn't which is best but which kind of detective work you want to do.
One thing to declare up front: the last entry is our own game. We've put it last so you can judge it against the others.
- For a five-minute daily logic puzzle, try Murdle or Clues by Sam.
- For a long, absorbing solo investigation, try the free original of The Roottrees are Dead.
- For something that teaches a real skill, SQL Murder Mystery has you query a police database.
- For a group, Murderer on CrazyGames is social deduction rather than evidence work.
- For two people working a case file, try Murder Mystery For 2.
The six games at a glance
| Game | What you actually do | Best for | The catch |
|---|---|---|---|
| Murdle | Solve a daily logic grid: who, how, where, why | A short daily habit | It's pure logic, with little story to investigate |
| Clues by Sam | Mark suspects innocent or criminal from clues | Players who hate guessing | Paid puzzle packs exist beyond the daily game |
| SQL Murder Mystery | Query a database to find a killer | Learning or practising SQL | You have to write code |
| The Roottrees are Dead | Rebuild a family tree from photos and an in-game web | One long, deep solo case | It isn't a murder, and the free version uses AI art |
| Murderer (CrazyGames) | Find the knife-wielding player in a 3D lobby | A quick game with friends | Desktop only, and it's about reflexes as much as reasoning |
| Murder Mystery For 2 | Read case files, link evidence, accuse together | Two people talking it through | Most cases and voice chat are paid |
Daily logic puzzles: Murdle and Clues by Sam
Murdle is a daily mystery logic puzzle by G. T. Karber: you work out who did it, how, where and why. It began as a website before becoming a bestselling book series, and there's a small practice version if you're new to logic grids. Murdle suits you if you like crosswords and want a mystery flavour rather than a long investigation.
Clues by Sam has one rule we like a lot: you can't guess. You tap suspects to mark them innocent or criminal, and the game only accepts moves that follow from what you already know. If it refuses a move, you've misread a clue. New puzzles appear daily and get harder through the week.
A long solo case: The Roottrees are Dead
The Roottrees are Dead is the deepest game here. After a plane crash kills the head of a wealthy family and his three daughters, you're hired to work out who the blood relatives are. You fill in a family tree by reading photos and notes and searching an in-game version of the web.
Jeremy Johnston built the original from a Global Game Jam prototype and released it free in browsers, with a donation link. It uses AI-generated art, which is the reason it's free. A paid remaster with new illustrations came to Steam in January 2025. Strictly speaking this is a genealogy mystery rather than a murder, but the deduction is real and it will take you far longer than anything else on this list.
A game that teaches a skill: SQL Murder Mystery
SQL Murder Mystery comes from Northwestern University's Knight Lab. A murder has happened in SQL City, and the only way to investigate is to write database queries, starting with the crime scene report. It's designed for beginners and for experienced SQL users looking for a challenge. If you've been meaning to learn SQL, it's more motivating than most tutorials. If you've no interest in code, skip it.
A group game: Murderer
Murderer on CrazyGames is a first-person multiplayer game inspired by Among Us and Werewolf. The suspect has a knife, the gunner has a revolver, and civilians hunt for clues to earn a gun of their own. It's the odd one out here, since you're reading people and reacting quickly rather than studying evidence. That's the split in the genre: social deduction versus evidence deduction. CrazyGames lists it as desktop only, so it's not one for phones.
For two people: Murder Mystery For 2
Murder Mystery For 2 is the game we make. Each player holds different evidence: the Senior Detective has the crime scene and forensics, and the Criminal Profiler has the suspects and communications. You meet at a shared evidence board and make one joint accusation, or you can play both roles solo.
To be specific about "free": only the daily case is free, with no ads, and no account is needed. It rotates through the whole library, so you get a different case each day. Every other case, built-in voice chat and Voice-Only mode need a $3.99 24-hour pass or a $9.99 lifetime unlock. You can always play the daily case over your own phone call instead.
Murder Mystery For 2 is a free browser-based two-player detective game with asymmetric evidence, live co-op and built-in voice chat. The daily case rotates every 24 hours.
Play today's case free →What "free" really means in a browser game
Free rarely means there's no business model. Before you settle into a game, it's worth knowing which kind you're looking at:
- Free and supported some other way: the game is the whole offer, perhaps with a donation link, like the Roottrees original.
- Free daily, paid extras: the daily puzzle costs nothing, and books or puzzle packs bring in the money. Murdle and Clues by Sam work like this.
- Free portal game: the game is hosted on a site that may show advertising around it.
- Free tier with paid content: some content is free and the rest is locked. That's how ours works.
A word on copycat sites
While researching this list, we found many results for these searches on unrelated or hijacked-looking domains, with game names pasted onto thin pages. Some are probably harmless, but there's no reason to use them. Check that you're on the game's own site or a known portal, and be wary of any "detective game" that asks you to download something or allow notifications before you've played.
Where to go next
If you've finished these and want more, paid games are the next step. Our guide to solo detective games covers Return of the Obra Dinn and The Case of the Golden Idol, and our list of detective games for two players covers co-op options. Prefer paper and envelopes? See our comparison of cold case games.
Sources
All games were checked on their own sites or listings in November 2026; features and prices can change.
- Murdle and Wikipedia, G. T. Karber
- Clues by Sam
- The Roottrees are Dead on itch.io and Wikipedia
- Northwestern University Knight Lab, SQL Murder Mystery
- CrazyGames, Murderer