Keyhole Games
A desk lamp over a cork board of suspect photos joined by red string, with a magnifying glass and a brass key on the desk.

Coming soon

Murder mystery puzzle game: the Daily Suspect and Casebooks

Coming soon // 1 player

A free murder mystery puzzle every day, and planned Casebooks with one town, one running story and rules that get harder.

Coming soon

New from Keyhole Games: Daily Suspect Casebooks.

Murder mystery puzzles ask you to work out who did it from a short list of clues, with no guessing allowed. We already run a free one every day, the Daily Suspect. The Casebooks are the bigger version: whole books of cases, one town and one running story, getting harder as you go. They are not open yet, and this page says what is planned.

The murder mystery puzzle game you can play today

The Daily Suspect is free every day. Each case gives you four suspects, four places and four items, and a handful of clues. Cross off what cannot be true until one answer is left. There is exactly one solution to every case, and the clues never need a guess.

What a Casebook adds

  • A running story. One town and one mystery across the whole book. The first Casebook is set at the Larkspur Hotel.
  • Rules that grow. The early cases are daily-size. Later chapters add a fifth suspect, a motive to work out, and a forged clue you have to spot and strike out.
  • The Locksmith as your host. The same dry voice as the daily, opening each chapter and judging your answer.

The daily stays free. Casebooks are planned as extra books for people who want a harder case tonight.

At a glance

Players
One, solving at your own pace.
Length
A few minutes for an early case, longer for a late one.
You need
A phone, tablet or computer. No app and no printing.
Status
Planned. Not open, and no date or price has been set.

Get a launch alert

It is not open yet and no date has been set. Leave your email and you get one message when it is ready.

While you wait

Solve today's Daily Suspect, browse all the daily puzzles, or read about our mystery games. Two of you? See the murder mystery game for two.

Updated 4 November 2026.

Questions

Are the Casebooks available yet?

Not yet. The free Daily Suspect is open every day. The Casebooks are planned, with no date or price set. Leave your email in the launch alert on this page and you get one message when they open.

What is a murder mystery puzzle?

A logic puzzle. You are given suspects, places and items and a few clues, and you cross off what cannot be true until one answer is left.

Can I play one now?

Yes. The Daily Suspect is free every day.

Will the daily stay free?

Yes. Casebooks are planned as extra books alongside it.

Do the puzzles need guessing?

No. Each case has exactly one solution that the clues prove.

Who hosts the Casebooks?

The Locksmith, the same host as the daily.

Do I need an app?

No. It runs in the browser on a phone, tablet or computer.

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Join a game

Type the four letters on the host's screen.

No app and no account needed. Guests always play free.