Caesarodunum's Fall — Decrypt the Fortress That Swallowed Rome's Glory
Solve the mystery of Caesarodunum's transformation: why did Rome's greatest Gallic amphitheater become a fortress? Decipher the conspiracy that erased an empire's power.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the 1st century, Tours—then called Caesarodunum, 'Caesar's Fortress'—stood as one of Rome's most magnificent outposts in Gaul
Between 10 and 15 AD — The Birth of Caesarodunum
In the 1st century, Tours—then called Caesarodunum, 'Caesar's Fortress'—stood as one of Rome's most magnificent outposts in Gaul. Its colossal amphitheater, expanded to hold 34,000 spectators, symbolized imperial dominance across the Loire Valley. But by the 3rd century, something changed. The amphitheater was hastily fortified with ramparts. Records vanished. The structure was buried beneath medieval streets, forgotten for over 1,500 years. Your mission: walk the hidden geometry of Old Town Tours and uncover the truth. Why did Rome transform its grandest entertainment venue into a defensive stronghold? What threat forced the empire to weaponize its own monument? The answers lie hidden in the street patterns, the cathedral's shadow, the Gallo-Roman walls, and the amphitheater's buried vaults—each a clue to the conspiracy that reshaped an empire's final stand in Gaul.
« Caesarodunum, forteresse de César, surpassait en grandeur les amphithéâtres de Nîmes et d'Arles réunis »— Ptolémée, Géographe grec, IIe siècle après J.-C.
The Colossal Amphitheater of the Turones
Founded between 10 and 15 AD on a strategic hill overlooking the Loire, Caesarodunum was the capital of the Turones, a Gallic people subjugated by Caesar. Its very name — 'fortress of Caesar' — testifies to Roman ambition. The city extended over 80 to 100 hectares with structured urban planning, paved roads, a wooden bridge over the Loire (40-50 AD) and public baths. Ptolemy in the 2nd century describes it as a marvel of urban architecture.
The amphitheater of Caesarodunum defies imagination: capable of accommodating between 14,000 and 34,000 spectators, it rivaled the Roman Colosseum itself. Its elliptical outline, still perceptible today in the arc formed by the streets of Général Meusnier, Racine and de la Bazoche, testifies to colossal dimensions. Transformed into a fortress from the 3rd century against barbarian invasions, then demolished stone by stone, it left urban scars in the city that only initiates know how to decipher.
A game, a guided tour and a heritage guide — all in one
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. »
How does it work?
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.
The game downloads to your phone on start. Once the "✓ Downloaded" indicator appears, everything works without data — narration, AR, GPS and puzzles. Perfect abroad without a data plan.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
The Route
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.
How does it work with a group?
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.
- ✓All codes are independent — play at the same time OR separately, each team advances at its own pace.
- ✓Leaderboard between your teams + global game leaderboard — each score appears in the public ranking.
- ✓More than 10 phones or need a personalized quest? Discover custom tours.
Ready to live this adventure?
Get my code · 12€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Practical info
Why this route?
Immersive Augmented Reality
Gladiators, Roman architects and ancient engineers emerge from the streets to reveal the secrets of the lost amphitheater
Authentic Archaeological Route
Follow the exact perimeter of the amphitheater in today's streets, from forum foundations to castrum remains
Dimensional Reconstruction
Collect scattered measurements to reconstruct the complete dimensions of Gaul's largest amphitheater
34,000 spectators in the amphitheater that challenged Rome
Reconstruct the dimensions of the Caesarodunum colossus
9 features nobody else has
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
AR treasure chest
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
AR narrator character
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.
Magic golden letters
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
Written + audio narration
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.
360° radar + vibration
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Heritage storytelling
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
Progressive AI hints
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
AR selfie memento
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
Zero app to install
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
Frequently asked questions
Q01Is Caesarodunum's Fall — Decrypt the Fortress That Swallowed Rome's Glory similar to a treasure hunt?
Same spirit: search, deduce, find. But here the "treasure" is a full story to piece together in eight stops. Each stop gives you a fragment of the final code. Eight fragments later, you've cracked it.
Q02How many stops are in Caesarodunum's Fall — Decrypt the Fortress That Swallowed Rome's Glory?
Eight stops total. At each stop you find a camera clue, solve the puzzle, collect a fragment of the final code. With all eight, you've got the answer.
Q03Is Caesarodunum's Fall — Decrypt the Fortress That Swallowed Rome's Glory suitable for a challenge-seeking teen?
Absolutely. The puzzles aren't obvious — a curious teen will sweat just enough to be proud of cracking them. Progressive hints prevent frustration: if stuck, unlock hint level 1, then 2, then 3.
Q04What if we get stuck on a puzzle?
Three hint levels per puzzle, with a small increasing time penalty. If truly stuck after level 3, you can skip the step (45-min penalty). The point: nobody stays blocked and goes home frustrated.
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Your turn to play
Walk the phantom outline of the lost amphitheater, from castrum remains to forum foundations. Collect the eight dimensional fragments hidden in Tours' urban fabric to reconstruct the plan of the arena that surpassed the Colosseum. Between augmented reality and urban archaeology, solve the mystery of Caesarodunum.
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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