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Decipher the hidden war council of Vercassivellaunos and uncover the Arverni strategy that nearly toppled Rome during the Gallic Wars.
📱 1 to 10 phones · 1 team per phone · Independent codes
57 BC
57 BC. The Arverni confederation stands at a crossroads. Vercassivellaunos, trusted lieutenant of the great Vercingetorix, convened a secret assembly at Corent—the sacred heart of Arverni power. Here, in the vast banquet enclosure surrounded by towering palisades, tribal leaders plotted their final resistance against Caesar's legions. Thirty thousand broken amphoras litter the sanctuary floor, evidence of ritual libations and coded messages passed between conspirators. But the strategy was never fully recorded—only fragments remain, hidden within the sacred precinct, the grain silos, and the merchant quarters. Your mission: reconstruct the lost war council's decisions by deciphering the material traces left behind. Solve the riddles of Corent's monuments, expose the Arverni's ultimate gambit, and determine whether Vercassivellaunos's plan could have changed the course of Gallic history.
« Vercassivellauni permissa est summa imperi »— Jules César, Commentaires sur la Guerre des Gaules, VII, 76
In 52 BC, Vercassivellaunos commands the Arverni cavalry alongside Vercingetorix during the Gallic revolt against Caesar. An experienced chief of the Arverni territory, which extended over present-day Auvergne, he intimately knew the natural resources of his region, particularly the sacred thermal springs of Vichy, venerated for centuries by the druids.
After the defeat at Gergovia and the retreat to Alesia, Vercassivellaunos allegedly entrusted to Vichy's thermal waters an ultimate resistance plan. Archaeologists have found traces of Gallic occupation around the springs, suggesting this site was already considered sacred long before Roman times. The mystery of this final Arverni stratagem remains intact.
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
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.
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Relive the final clashes between Arverni and Caesar's legions
Discover the mystical role of thermal waters in Gallic culture
Immerse yourself in the secret rituals of Arverni druids
Following the last Arverni chief
Unravel the mystery of Gallic resistance
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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Discover how Vercassivellaunos, Vercingetorix's lieutenant, used the sacred waters of Vichy to preserve the ultimate secret of Arverni resistance. Between thermal springs and druidic rituals, reconstruct the battle plan that could have changed the history of Gaul.
1 purchase = 1 phone. Play several on the same device.
No calendar booking. Code sent immediately by email.
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.

Pour découvrir l'histoire du site où Vercassivellaunos tint son dernier conseil de guerre, et admirer l'architecture Belle Époque évoquée à l'acte 6
Pour expérimenter les bienfaits des eaux thermales vénérées par les Arvernes, et comprendre pourquoi ce lieu était sacré pour les druides
Pour approfondir l'histoire antique de Vichy et voir les vestiges gallo-romains qui témoignent de l'occupation après la conquête de César
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.