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Uncover the clandestine Catholic network hidden in 17th-century Amsterdam. Decipher coded messages left by Jan Hartman's underground church to expose the conspiracy that kept faith alive in plain sight.
📱 1 to 10 phones · 1 team per phone · Independent codes
Amsterdam, 1663
You are a confidential agent of William of Orange, operating in Amsterdam during the 17th century's religious turmoil.
Your mission is to map the network of secret churches across the city,
Delve into Amsterdam's secret alleys to unmask the clandestine faith that defied official edicts after the Reformation.
You're not just buying an escape game. You're carrying a living guide — historical anecdotes, forgotten legends, key monuments, hidden architecture — unfolding as you go.
At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.
Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.
Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.
Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.
A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.
Keep access to the guide & game for 1 year. Come back any time, share it with friends.
« You will not leave this city the way you entered it. »
Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.
No app to download. Play directly from your browser. Guided step by step, at your own pace.
One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.
Point your phone at the façade: a historical character appears and speaks to you in your language. Golden letters magically write themselves on the wall to reveal the puzzle answer.
Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.
French, English, German, Spanish, Italian + 27 other languages auto-translated by AI.
Places tied to your adventure — optional entries, totally up to you · per person
Your quest begins in front of the Westerkerk, an imposing Protestant church built between 1620 and 1631, whose 87-meter spire is the tallest in Amsterdam. Designed by city architect Hendrick de Keyser, this Reformed church became a symbol of the Reformation in the Netherlands after 1578, following the confiscation of Catholic places of worship. Here, you seek the first trace of dissent, a subtle message engraved near the tomb of Rembrandt van Rijn (1606-1669), a major painter of the Dutch Golden Age, interred in the church. This is a crucial starting point for understanding the religious duality of the capital of the Netherlands.
A few steps from the Westerkerk, on Westermarkt, you discover the statue of Anne Frank, sculpted by Mari Andriessen in 1960. While not directly linked to the clandestine worship of the 17th century, this work was inaugurated near Anne Frank's hiding place (1942-1944), located 300 meters away at Prinsengracht 263. It embodies the persecution of minorities and resistance to oppression, a poignant echo of the 17th-century Catholics forced into hiding. Nearby, the Homomonument, with its three pink granite triangles laid in 1987, the world's first gay memorial, also recalls the history of persecutions in the historic Jordaan district.
Your itinerary then leads you to Oudezijds Voorburgwal 38, home to the Museum Ons' Lieve Heer op Solder. This historic monument, a clandestine Catholic church, was ingeniously set up around 1663 in the attic of three 17th-century houses. It was Amsterdam's second secret church after the Begijnhof, capable of accommodating up to 150 worshippers on two galleries. Used until 1887, it was transformed into a museum in 1888, becoming the city's second oldest museum after the Rijksmuseum. Here, you examine the central Baroque altarpiece with its painting of the Baptism of Christ and the period organ, searching for clues about the secret life of the faithful.
Continue your investigation towards the Oude Kerk, Amsterdam's oldest church, founded around 1213 with its 14th-century Gothic nave. Confiscated in 1578 during the Reformation, it became Protestant, forcing Catholics to practice their faith in secret. Just 200 meters from the Amstelkring, this church is a pivotal site in Noord-Holland's religious history. Your route then takes you to the Begijnhof, a Beguine court founded in the 14th century. This site housed the first clandestine Catholic chapel after 1578 and preserves eight 14th-century houses, including the secret Houten Huis church from 1475. This place symbolizes Amsterdam's religious tolerance, where private worship was tolerated behind closed doors.
As you complete your journey through the streets of Amsterdam, you have deciphered the codes of an era when faith was lived in the shadows, from the Westerkerk to the Begijnhof, and through Huis Marseille, a patrician house from 1665 on the Keizersgracht canal, transformed into a photography museum in 1999. This complex network of clandestine places of worship and 17th-century merchant residences, like that of the Van Hoorn family, has revealed the richness of the Jordaan's UNESCO heritage. You leave with an understanding of the challenges of religious tolerance and the ingenuity of the Amsterdammers, imbued with the spirit of "Heldhaftig, Vastberaden, Barmhartig" – Valiant, Resolute, Merciful, the motto of the city of Amsterdam.
8 stages through the city
The gameplay: AR, camera, hidden clues
At each stop, open your phone camera: an augmented reality character appears on the façade and speaks your language. Hunt the clue — it materializes as golden letters on the real wall or floats in front of you. When you find it, the phone vibrates, an AR chest opens and reveals your answer fragment. 8 stops, 8 clues to find with the camera, 1 final code.
The stops on your route are a surprise. You'll discover them one by one, guided by your phone, starting from the meeting point.
One phone = one team. Pick the number at checkout (1 to 10).
Solo, or a group sharing the screen. One team, one code.
Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.
Friends, bachelor/bachelorette, small office outing — each their own code, each plays at their own pace. Tiered pricing then €6 flat per phone from the 6th.
Ready to live this adventure?
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Hope, even in the deepest darkness.
Every step reveals the strength of an unshakeable network.
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
Point your phone at the façade: a knight, witch, monk, sailor, detective or ghost appears full-screen and speaks to you in your language with their dedicated ElevenLabs voice (each character has their own unique voice) — your living guide.
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
Every puzzle available as text AND voice-over: read at your own pace or listen eyes-free while walking. Great in groups and for accessibility.
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
No, never. You get a link, you click, it plays in your browser. That's the point of a PWA: same as an app, without the hassle.
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
1 h 30 to 2 h 30 depending on your pace. The timer runs but only for the leaderboard — you play at your own tempo.
You get 3 levels of hints per puzzle (increasing penalty). If truly stuck, you can skip the step (45-min penalty but you keep going).
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Pre-register or contact us — we'll email you as soon as your city is live.
Point your phone at the façade: a historical character appears full-screen and speaks to you in your language. At the puzzle climax, golden letters magically write themselves on the real wall — that's your answer. After each puzzle solved, a treasure chest floats in front of you. Seeing is believing.
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Delve into Amsterdam's secret alleys to unmask the clandestine faith that defied official edicts after the Reformation.
1 purchase = 1 phone. Play several on the same device.
No calendar booking. Code sent immediately by email.
🔒Secure payment · Code in 5 min · Free cancellation
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
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5-10€. Savourez cette gaufre hollandaise traditionnelle fourrée au sirop de caramel, un délice local d'Amsterdam.
18-25€. Découvrez les monuments historiques d'Amsterdam et son patrimoine UNESCO depuis l'eau, offrant une perspective unique sur la ville.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.