Namur Citadel — Decipher Vauban's Hidden Fortress Code
Crack the geometric secrets embedded in Vauban's 1692 siege fortifications. Uncover the hidden cipher that reveals why Louis XIV's greatest engineer left coded messages in stone and earth.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1692, Marshal Vauban orchestrated one of history's most audacious military sieges—the conquest of Namur Citadel from Spanish hands for Louis XIV
Namur Citadel — Decipher Vauban's Hidden Fortress Code
You are a military strategist, operating in Namur in 1692, tasked with either breaching or defending its formidable citadel.
Your mission: decipher the strategies and codes that made this fortress a symbol
Uncover the military secrets of the Citadel of Namur, an impregnable fortress that withstood 5 major sieges between 1692 and 1914.
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.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
The story that haunts this land
Your adventure begins on the Esplanade of the Citadel of Namur, a strategic starting point developed in the 19th century after the partial demilitarization of 1891. From here, you admire the panoramic view of the confluence of the Meuse and Sambre, a site that justified the fortress's construction as early as the 11th century. Access via the Terra Nova funicular from the city center foreshadows the modernity that constantly transformed this Citadel, fortified by the Dutch in the 17th century according to Vauban's principles, an engineer whose influence is palpable throughout the site.
Continue towards the Terra Nova Visitor Center, inaugurated in 2018, a key location for understanding the 2000 years of European military history of the Citadel of Namur. It is here, near the Porte de Terra Nova built in the 18th century, that you delve into the 7 km of underground passages dug between 1740 and 1880. The Citadel, the largest in Europe, was demilitarized in 1891 but retains an exceptional Walloon military heritage, with 450 meters of visitable galleries featuring 3D projections and sound effects.
The exploration of the underground passages leads you to La Fourmilière, an underground battery dug in the 18th century. This network of narrow galleries, named for its resemblance to an ant's nest, housed troops and ammunition, testifying to the ingenuity of military engineers such as Menno van Coehoorn and Vauban. Ascending, the Citadel's Ramparts reveal the fortifications reinforced by these same Dutch and French engineers, including the Bastion des Dames and Fort d'Orange, erected in the 17th and 18th centuries.
Walking along the Ramparts, you imagine the five major sieges that the Citadel of Namur withstood between 1692 and 1914. Figures like Louis de Crevant, Count of Humières, or William III of Orange-Nassau, King of England, marked these historical confrontations. The Bastion des Dames and Fort d'Orange, strategic remnants, illustrate the complexity of this Vauban fortress's defenses, a true stake in European conflicts and a pillar of Walloon heritage.
Your itinerary concludes at the Viewpoint of the Citadel of Namur, offering a final perspective on this historic site. Looking out over the sprawling city of Namur, you have deciphered the secret codes of this fortress, understanding its central role in the history of Wallonia. This Namur scavenger hunt has introduced you to the historic underground passages, the Porte de Terra Nova, and the many facets of this military complex, transforming a simple Namur visit into an immersive exploration of European military heritage.
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?
Military Engineering
Delve into Vauban's mind and discover the innovations that revolutionized the art of fortification.
Vauban's Fortifications
Explore the ramparts, bastions, and underground passages of a UNESCO World Heritage-listed citadel.
State Secrets
Thwart a historical conspiracy by deciphering the codes hidden by the greatest strategist of his time.
Unravel Vauban's hidden plans.
The fate of Namur rests on your sagacity.
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
Q01Do I need to download an app?
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.
Q02Does it work offline?
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
Q03How long does a game take?
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.
Q04What happens if I'm stuck?
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).
Q05What's the age range?
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Q06What if my city isn't in the catalogue?
Pre-register or contact us — we'll email you as soon as your city is live.
Q07What is augmented reality exactly?
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.
Avis des aventuriers
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Your turn to play
Uncover the military secrets of the Citadel of Namur, an impregnable fortress that withstood 5 major sieges between 1692 and 1914.
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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