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1428: In the shadow of pyres, a tormented executioner hides a secret code exposing judicial manipulations and sacrificed innocents. Decipher his clues across the old town to uncover the forgotten truth.
📱 1 to 10 phones · 1 team per phone · Independent codes
Sion, 1428
You are Master Jean de Monthey, clerk and archivist to Bishop Walter Supersaxo in Sion, moments after the pyre of Pierre de Torrenté, Sion's last sorcerer, has died out
Dive into 1475 Sion's alleys, where the breath of a heretical conspiracy threatens to tear apart Valais and shake episcopal power.
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
« Sion is an essential stopping place for all who wish to learn about the antiquities of this country. »— Jean-Barthélemy Gaillard, 'Picturesque Journey through Switzerland', 1789
The Executioner's Code investigation begins at the Remparts de Sion, remnants of the medieval wall that protected the city from the 13th century. In 1475, these walls witnessed the city resist assaults from the Bernese and Savoyards, marking a period of great instability. It is here that Pierre de Torrenté, before his capture, allegedly concealed the first elements of his code, hastily carved into the stone. Your role is to scrutinize these fortifications to uncover forgotten symbols, essential clues to understanding the extent of the conspiracy threatening the stability of Valais.
Your journey takes you to the Tour de la Vidomne, a 14th-century guard tower that served as a prison and place of judgment. This building, closely linked to episcopal justice, was the scene of numerous heresy and witchcraft trials, culminating in the Valais witch trials of the 15th century. Pierre de Torrenté was certainly interrogated here. By examining the dark walls of this tower, you search for marks, scratches, or coded messages the prisoner might have left, clues that could shed light on the true nature of his accusations and the complicity of Sion's elites.
Place de la Planta, Sion's beating heart since the Middle Ages, is your next stop. This is where the great assemblies of Valais were held, and where, in 1475, Pierre de Torrenté's condemnation was proclaimed before the crowd. Markets and popular festivals coexisted with public executions, symbolizing the power of the Bishop of Sion. Among the patrician houses surrounding it, you must identify the residences of the notables linked to the case, their coats of arms, and their construction dates, to reconstruct the alliances and rivalries that may have influenced the trial and the city's future.
Following Rue du Grand-Pont, you head towards Place des Prisons, a place that still bears the weight of Sion's judicial history. In the 15th century, this street was a bustling commercial artery, but it also led to the dungeons where the accused awaited their fate. Contemporary writings describe justice that was often swift. Here, you must decipher the hidden messages in the architecture of the old buildings on Place des Prisons, searching for evidence that the Torrenté affair was merely a facade to mask a deeper power struggle within Valais. The nearby Église Saint-Théodule offers a striking contrast to these places of repression.
Your quest leads you to Passage Supersaxo and the Chemin de Croix in Valère, sites that illustrate Sion's devotion and sacred art. Passage Supersaxo, with its 16th-century architectural details, testifies to the episcopal family's influence on the city. The Chemin de Croix, leading to the Valère Basilica, is a centuries-old pilgrimage site. It is in these places of faith, where popular piety mixes with symbols of power, that you must assemble the final pieces of the puzzle. By observing the sculptures and frescoes, you discover how Torrenté's code fits into a broader history of resistance and secrecy, revealing the complexity of power in medieval Valais and the legacy left by these 15th-century events. This exploration of Sion offers you an understanding of Valaisan heritage beyond the beaten path.
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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Unravel the secrets of an executioner torn between duty and conscience, revealing his deep doubts.
Identify symbols of resistance and truth hidden in the old town, witnesses to a quest.
Explore a dark period where fear and power clashed, marking the history of Valais.
The past whispers its secrets to those who know how to listen.
Decipher the executioner's message and bring justice to the forgotten of 1428.
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 1475 Sion's alleys, where the breath of a heretical conspiracy threatens to tear apart Valais and shake episcopal power.
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.
Dès 20 CHF. Découvrez les cépages emblématiques de la région, comme la Petite Arvine ou le Cornalin, dans une cave locale de Sion.
12 CHF. Explorez l'histoire du Valais, de la préhistoire à nos jours, avec des collections sur l'évêché et les guerres d'indépendance.
Accès libre. Admirez les ruines imposantes de l'ancienne résidence épiscopale, offrant une vue panoramique sur Sion et la vallée du Rhône.
Accès libre. Parcourez ces anciens canaux d'irrigation à flanc de coteau, offrant une balade rafraîchissante et des vues sur les vignobles valaisans.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.