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Uncover the cryptic prophecy Jan Hus left before his execution at the Council of Constance. Decode clues hidden across Old Town landmarks to reveal a conspiracy that could rewrite Reformation history.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1415, amid the chaos of the Council of Constance, Bohemian reformer Jan Hus arrived under promise of safe conduct, only to be betrayed, imprisoned, and burned at the stake for heresy
You are Pierre d'Ailly, Chancellor of the University of Paris and influential cardinal, arriving in Constance for the Great Western Schism in 1414.
Your mission: navigate the
Dive into Constance in 1414, at the heart of the Council that would tear the Church apart and shape Central European history.
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
« Here Hus preached on July 6, 1415 before his burning. »— Inscription on the Hus-Stein, 1821
Your journey begins at the Konzilgebäude Konstanz, built between 1384 and 1388 to host the cathedral chapter's assemblies. It was here, in this 50-meter-long main hall, capable of accommodating up to 4000 people, that Antipope John XXIII was deposed on March 29, 1415, a central event of the Council of Constance. This monument, restored in a Neo-Gothic style between 1905 and 1911, was the main seat of the debates that ended the Great Western Schism, marking the beginning of a new era for the Church and the city of Constance.
Next, head to the Konstanzer Münster, this majestic Gothic cathedral whose construction began in 1380, and whose main tower was completed in 1856, reaching 74 meters. It was in these sacred places that Jan Hus preached on November 9, 1414, shortly before his arrest, defying ecclesiastical authorities. The cathedral, 102 meters long and adorned with 12 bell towers symbolizing the apostles, also houses Germany's oldest astronomical clock, installed in 1543. It is an essential site for understanding the ecclesiastical reforms debated during the Council of Constance.
Your path leads you to the Marktstätte Konstanz, the historic market square since the 13th century, a true medieval commercial center of Constance. Surrounded by 15th and 16th-century gabled houses in a bourgeois Gothic style, this square was unfortunately the site of public executions in the Middle Ages, including that of Hussites between 1415 and 1420. The Fountain of Justice (Gerechtigkeitsbrunnen), installed in 1693, bears witness to this tumultuous history. Only 300 meters from the Münster, it was a main axis for the Council's processions and public events.
Continue towards the Pulverturm Konstanz, a fortified tower from the 13th century (around 1255), which served as a powder magazine from 1688. 30 meters high, with a diameter of 13 meters and walls 3.5 meters thick, it was part of the medieval ramparts protecting access to the Rhine port. But darker is its role as a prison during the Council of Constance (1414-1418), where suspected heretics were held. Restored in 1950 after World War II damage, this tower is a powerful reminder of the religious repression of the era.
Your quest concludes at the Hus-Stein Konstanz, a commemorative stone erected in 1821 by the Friends of Hus Society, on the occasion of the 400th anniversary of his death. Located near the Rhine, 400 meters from the Münster, on the route of Hus's trial, it marks the presumed site of his preaching. The inscription « Hier predigte Hus am 6. Juli 1415 vor seiner Verbrennung » (Here Hus preached on July 6, 1415 before his burning) etches the memory of this Czech reformer into stone. By following this cultural route of the Council of Constance, you have explored the history of Constance, an imperial city of the Holy Roman Empire, and the heritage of Baden-Württemberg, discovering the places where destinies that shaped Europe were played out.
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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Dive into the greatest diplomatic event of the Middle Ages.
Explore the sites of his trial and tragic execution.
Discover Emperor Sigismund's role in this tumultuous period.
Truth shines even through the flames of heresy.
A hidden prophecy, a plot to foil.
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 Constance in 1414, at the heart of the Council that would tear the Church apart and shape Central European history.
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.
Environ 7€. Découvrez l'histoire culturelle de Constance et de la région du lac de Constance, avec des expositions sur le Concile.
Accès libre. Explorez la vie et l'œuvre du réformateur Jan Hus dans la maison où il a séjourné pendant le Concile de Constance.
Prix variable. Savourez les cépages locaux dans une cave traditionnelle de Constance, reconnue pour ses vins blancs et rouges.
À partir de 15€. Profitez d'une vue panoramique sur les rives allemandes, suisses et autrichiennes depuis le lac de Constance.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.