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Uncover the dark secret behind 'The Oath of Utrecht' – a 1579 pact that birthed a republic but hid betrayal, assassination plots, and a cursed vow. Decode clues across Domplein to expose the traitor before the curse claims you.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1579, on the very stones of Domplein, Utrecht's leaders swore 'The Oath of Utrecht' – a revolutionary pact that ignited the Dutch Republic's birth, defying Spanish tyranny
You are an archivist serving Maurice of Nassau, the Republican stadtholder, amidst the Thirty Years' War.
Your mission is to uncover crucial documents proving treason within the States General, threatening to
Delve into the heart of Utrecht, an ancient city, to thwart the 17th-century plots threatening the Dutch Republic, following in the footsteps of the great figures who shaped its destiny.
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
« Utrecht pleases »— Official motto of the city of Utrecht (adopted in the 17th century)
Your quest begins on Domplein, Utrecht's ecclesiastical administrative center since 1122, where Maurice of Nassau delivered a key speech in 1618, amidst the Thirty Years' War. Excavations from 1974-1986 revealed archaeological remains beneath this 1.5-hectare square, surrounded by rijksmonumenten. Here, facing the Academiegebouw, home to Utrecht University since 1636, you sense the tension between religious power and secular knowledge. This neoclassical building from 1826, designed by Jacobus van Lennep, with its 45-meter facade and Ionic columns, hosted thesis defenses as early as the 17th century, including Christiaan Huygens' in 1655. You search for the first clues, perhaps hidden in the shadows of its 300 m² interior.
The investigation then leads you along the Oudegracht, the main canal dug in the 13th century, around 1200-1250. Its unique wharves, the werfkelders, line this 3 km long, 20-meter wide canal, bordered by 400 gabled houses from the 14th-18th centuries. This was Utrecht's economic heart in the 16th century, a vital fluvial trade site during the Dutch Revolt. The 118 protected rijksmonumenten houses testify to the city's past wealth. Nearby, the Stadhuis Utrecht, a Gothic town hall built in 1407, enlarged in 1440, and given a Renaissance facade in 1616 by Cornelis G. van Noort, served as the municipal government's seat. Here, beneath its 45-meter tower, the Treaty of Utrecht was signed in 1713, ending the War of the Spanish Succession, a major event for the Dutch Republic. The 17th-century frescoes inside narrate the city's republican history, perhaps holding a hidden clue.
Continuing your thematic journey through Utrecht, you reach the Paushuize, a Renaissance manor built in 1517 for Bishop Henri de Berghe. Transformed into a papal residence in 1521, this rijksmonument no. 521, in late Gothic style with its 25-meter facade, hosted Pope Adrian VI in 1522, the last non-Italian pope until 1978. Its intact 15th-century cellar might conceal ancient messages. Janskerkhof, a paved square since the 13th century, stands as the center of the university district, surrounded by 20 listed buildings from the 17th-18th centuries. Weekly markets have been held there since 1314, and Calvinist sermons took place after 1580, marking a turning point in Utrecht's history. It's a place ripe for secret meetings and information exchanges, near the former monastery of the Knights Hospitaller of Saint John, founded in 1196.
Your quest then takes you to the Pieterskerk, a Romanesque parish church built around 1040, whose nave was extended in 1500. This rijksmonument no. 209, with its 30-meter tower, was even used as an arsenal in the 17th century, highlighting the military tension of the Dutch Republic. The tomb of Bishop Koenraad II, assassinated in 1122, a key event in medieval chronicles, reminds you of the power struggles that marked Utrecht's history. The city, with its Utrecht monuments, offers a unique thematic circuit to understand the past. Finally, the Domtoren, the tower of St. Martin's Cathedral, begun in 1321 and completed in 1382, stands at 112.32 meters. A symbol of episcopal power before the Reformation in 1580, this tower, rijksmonument no. 139 and a UNESCO candidate in 2017, offers a panoramic view of republican events, such as the fall of the bishop in 1672.
Completing this Utrecht treasure hunt, you have not only discovered Utrecht's monuments and historical heritage but also explored the layers of Utrecht's history, from the medieval era to the Golden Age of the Dutch Republic. Each stage of this Utrecht thematic circuit, from Domplein to Stadhuis Utrecht, passing through Oudegracht and Paushuize, has revealed the political and religious stakes that shaped the city. This route has immersed you in the narratives of the Treaty of Utrecht 1713 and figures like Adrian VI, Henri de Berghe, and Willem van Oranje, enriching your understanding of what a Utrecht visit entails. It's an exploration of the city for families, an interactive Utrecht visit that goes beyond simple tourism to become a true immersion into the soul of a city that, according to its motto, has always known how to please and reconcile.
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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Uncover the hidden clauses of the founding pact of the Netherlands.
Follow in the footsteps of the united provinces against Spanish tyranny.
Interpret the symbols carved in the stone of Utrecht's iconic buildings.
Unity makes strength
Unite to defend freedom
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 the heart of Utrecht, an ancient city, to thwart the 17th-century plots threatening the Dutch Republic, following in the footsteps of the great figures who shaped its destiny.
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
🪙+24 TripCoins granted with your booking
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
16€. Découvrez l'art et l'histoire d'Utrecht, des œuvres de l'École d'Utrecht aux créations de Dick Bruna (Miffy).
3-5€. Savourez une stroopwafel fraîchement préparée sur le marché d'Utrecht, une spécialité néerlandaise emblématique.
15-20€. Explorez Utrecht sous un angle différent en naviguant sur l'Oudegracht et ses werfkelders uniques.
17€. Explorez l'histoire du christianisme aux Pays-Bas, avec des artefacts et des œuvres d'art médiévales et modernes.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.