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Unravel the conspiracy behind the Synod of Dordrecht's hidden decree. Decode clues from 1618-1619 to expose the suppressed Arminian plot and claim the lost canons' truth before it's silenced forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1618, the grand Synod of Dordrecht convened in the heart of this free city to settle a explosive theological war between Calvinists and Arminians
You are an astute archivist in the employ of Stadholder Maurice of Nassau, dispatched to Dordrecht in 1619, to uncover a secret decree from the recently concluded Synod.
Your investigation
Dive into 1618 in the cobblestone streets of Dordrecht, where the fate of the United Provinces and the Reformed faith were decided during a historic synod.
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
« Dordrecht, glory and desire »— Motto of the city of Dordrecht
Your quest begins at the Grote Kerk in Dordrecht, this Gothic church built between 1330 and 1470, whose 90-meter tower dominates the city. It was here that the Synod of Dordrecht, which gathered Reformed theologians from November 13, 1618, to May 9, 1619, held several of its crucial sessions. Exploring the interior, you will discover the 1855 Witte organ and the 1583 stained-glass window commemorating William the Silent, testimonies to the spiritual heritage of Zuid-Holland. The carillon of 68 bells, one of the largest in the Netherlands, still echoes with the debates that shaped the Dutch Golden Age.
Continue towards the Stadhuis, the town hall built in 1383, whose Gothic Renaissance facade was adorned with 279 statues in 1605. This place served as the seat of the States of Holland and Zeeland during the Twelve Years' Truce (1609-1621), the period during which the synod was held. The 32-meter Renaissance tower, added in 1618 and completed during the Synod of Dordrecht, symbolizes the civil power that convened the theological debates. The knights' hall, with its portraits of stadhouders, will remind you of the political figures of the time, notably Maurice of Nassau.
The path then leads you to the Groenmarkt, a historic square in the city center of Dordrecht, lined with 17th-century gabled houses. Since the Middle Ages, this square has been a marketplace and was a nerve center for political assemblies during the Twelve Years' Truce. The delegates of the 1618-1619 synod certainly crossed it, theological discussions mixing with the hubbub of merchants. Not far, the Wolwevershaven, a former wool weavers' quarter, with its 17th-18th century houses, testifies to the vital commercial activity for Dordrecht and Zuid-Holland.
Your journey takes you to the Hof van Nederland, a complex of buildings that was once a provincial court in the 17th century. This site is directly linked to the civil authorities of Dordrecht who convened the national synod in 1618, highlighting the intertwining of temporal and spiritual power. Its Dutch Renaissance architecture and inner courtyard, used for official assemblies, still resonate with the decisions made over four centuries ago. Nearby, the Augustijnenkerk, a 14th-century church, closed in 1572 during the Iconoclasm then reused as a Reformed church, integrates the urban fabric traversed by the delegates in 1618-1619.
The Vismarkt, a fish market square since the 13th century, surrounded by 17th-century facades, is your last stop. This commercial heart of Dordrecht was a meeting place where theologians and bourgeois alike crossed paths during the synod. The statue of Justice, erected in 1617 just before the synod, watched over transactions and debates. Your exploration will have taken you through the Dordrechts Museum, founded in 1842, whose Golden Age art collections and the wing dedicated to local history, including artifacts from the Synod of Dordrecht, offer a final glimpse into this key moment in Zuid-Holland's heritage.
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?
Get my code · 12€No calendar booking. Code sent immediately by email.
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Decipher excerpts from 17th-century theological and political documents.
Delve into the heart of the controversies that shaped the religious and political identity of the Netherlands.
Use architectural details of historical monuments to reveal hidden clues.
The past whispers, will you listen?
Unravel the secrets of the Synod of Dordrecht.
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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Dive into 1618 in the cobblestone streets of Dordrecht, where the fate of the United Provinces and the Reformed faith were decided during a historic synod.
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.
15€. Découvrez le Wolwevershaven et les maisons à pignons du XVIIe siècle depuis l'eau, une perspective unique sur le port intérieur.
18€. Explorez les collections d'art du Siècle d'or et les artefacts du Synode de Dordrecht dans ce musée fondé en 1842.
14€. Visitez ce complexe historique, ancien tribunal provincial du XVIIe siècle, où les autorités civiles ont convoqué le synode.
3-5€. Savourez une gaufre hollandaise traditionnelle fraîchement préparée sur la Groenmarkt, comme les habitants du XVIIe siècle.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.