The same story in every city: like an escape room, this story is yours to crack once, so pick the city that makes it special. Want more? Secrets games tell a new story in every city.
1–4 players per team
On your own phone, no app
Language of the game: English +31
Start any time within 12 months
Free cancellation until you start
Work a detective murder case through central Haarlem, from the Grote Markt past St Bavo to Teylers Museum, at your own pace.
Balthasar died in Haarlem and the file lands on your phone. Everything you need to close it is out there on the street.
This is a self-guided murder mystery game you play outdoors, at your own pace, with Haarlem for a board. Your phone carries the case file and the city carries the evidence. Clues to gather, digital characters to question, codes to break and a name to give at the end - a detective game with no host at a meeting point, no timetable and no group to keep up with.
The case takes you past St Bavo, Bakenesserkerk and Teylers Museum.
Where the Case Takes You in Haarlem
Frans Hals Museum and Waalse Kerk Haarlem come into it too. Expect 3 to 4 km on foot, at whatever speed suits the slowest member of the group.
Had great fun playing secrets of Haarlem!
★★★★★ Martin M.
Playing the Detective Game in Haarlem
You move, the case moves. Each stop has something to solve and each digital character has something to say once you have solved it, and the suspect list shortens accordingly. Figure on 1.5 to 2 hours across 3 to 4 km, with as many breaks as you feel like taking. The reasoning runs the way it does in a Sherlock Holmes story: small observations first, the accusation last.
For Families, Friends and Teams in Haarlem
With friends. Four of you on one phone and everybody gets a say. Somebody always commits to a theory early, loudly, and wrongly - that is half of what you will talk about afterwards.
With your team. Two teams on one case turns it competitive, which is the whole point. No booking a room, no briefing, no waiting for stragglers: a team outing in Haarlem that starts when the last person shows up.
With kids. The puzzles work from about eight years old. Younger ones walk along and help, older ones take over the phone, and the whole thing survives being interrupted by ice cream.
Frequently Asked Questions
How does the murder mystery game work?
You play it through a direct link in the browser on your own phone. It opens in Haarlem, the story moves with you, and every stop holds a puzzle, a code or a photo task standing between you and the next piece.
How long does it take?
About two hours of playing and 3 to 4 km of walking. How long the whole outing takes is up to you, because you can stop for as long as you like and carry on after.
How many people can play on one ticket?
One ticket covers one to four players on a single device, €19.95 in total. Bigger groups buy one ticket per four and race each other through the same murder.
Do we need to book a time?
Just a date. The hour is yours to choose, because nobody is standing anywhere in Haarlem expecting you, no meeting point, no guide, no group.
Is it suitable for children?
From roughly age eight it works well. The puzzles are built to be solved, not to defeat anyone, and younger children happily walk along and help.
What happens if it rains?
Nothing forces you to keep walking. Duck into a cafe, let it pass and carry on when you feel like it - there is no time limit on any part of this.
Is this a detective game or a walking tour of Haarlem?
Both, in practice. You cover Haarlem on foot and you notice far more than you would on a normal walk, because the case gives you a reason to look closely at things you would otherwise pass.
What else is there to do in Haarlem?
There are other city games in Haarlem built on the same idea and a different story, and the Netherlands has plenty more where this came from.
Go to the startThe start point is in your email. Any day within 12 months.
PlayOpen the link on one phone per team and press start.
What players in other cities say
★4.4 on Google (24 reviews)
★★★★★
Wir (Mein Mann, unsere 9-jährige Tochter und ich) haben heute ganz spontan das Spiel "Moordmysterie Düsseldorf" gebucht und gespielt. Die Buchung verlief schnell und reibungslos.
Es hat super viel Spaß gemacht! Die Story, die Rätsel, das Konzept, die Route, die Gestaltung der App... richtig gut!!!
Das Spiel würde ich vor allem Familien mit Kindern empfehlen.
Für Erwachsene waren die Rätsel (meiner Meinung nach) zu einfach. Aber trotzdem wegen der schönen Route durch Düsseldorf, der Story, den lustigen Anweisungen zwischendurch eine schöne Aktion, die man zusammen machen kann.
Lingling Z.October 2026 · via google
★★★★★
Had great fun playing secrets of Haarlem!
Martin M.March 2026 · via google
★★★★★
Game in Amsterdam was fun!
Enzo L.March 2026 · via google
★★★★★
Had So much fun playing while exploring the city
Philip C.March 2026 · via google
★★★★★
I had a fantastic experience with CityGame! The concept is creative, engaging, and a great way to explore a city in a completely new way. The games are well-designed, combining puzzles, storytelling, and adventure so you’re constantly discovering something interesting around every corner.
What I especially love is how CityGame turns a normal walk through the city into an interactive experience. It’s perfect for friends, families, or team outings, and it makes sightseeing much more exciting than the usual tours.
Everything was easy to use, the challenges were fun and clever, and it really encouraged us to look closer at the city and its hidden details. Highly recommended if you’re looking for a unique and memorable way to explore!
Jessica S.March 2026 · via google
★★★★★
This is an interesting way to conduct a self-guided Amsterdam city tour. It used the GPS on your phone to guide you to stops on a route. There are mini quizzes once you arrive at the stops on the path. The quizzes draw your attention to features in front of you or to a brief history of the place. In many cases, we visited a spot that would not have been obvious as a regular passer by. The tour as a whole was interesting to us as newcomers, but I would have liked more information on many locations we visited - a few links outside of the app for each place would have been helpful. Beyond that, the interface was a bit clunky and sometimes awkward to navigate. We definitely don't regret trying this out and feel like we got our money's worth on the experience.
JaibhijaiJune 2024 · via google
How we check reviews
These reviews were left by players on Google and other review sites and are copied from there as they are, with their source.
Happy Sinterklaas!Worth 
