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Decipher the hidden symbols in Van Eyck's masterpiece before Nazi forces destroy it. Uncover the alchemical code that saved Ghent's greatest treasure during WWII.
📱 1 to 10 phones · 1 team per phone · Independent codes
It is 1944, and the Ghent Altarpiece—the Mystic Lamb painted by Jan and Hubert van Eyck—faces annihilation
You are a detective specializing in art theft, arriving in Ghent in 1934, hot on the trail of the stolen Righteous Judges panel, commissioned by UNESCO to solve its enduring mystery.
Your
Uncover the mystery of Europe's most stolen altarpiece, Van Eyck's Mystic Lamb, whose panel remains missing since 1934.
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
Your investigation begins at Gravensteen, fortress built in 1180 by Philip of Alsace as a comital prison. These 30-meter-high walls witnessed the Counts of Flanders, including Baldwin IX who resided here before departing for the Fourth Crusade in 1202. In the castle's documented dungeons, you discover the first clues: did the Van Eycks hide messages in their works to escape religious censorship? Ghent oral tradition claims the painter brothers came to observe the tortured to capture human suffering's expression, a revolutionary technique that would make their fame.
Your route leads to Saint-Bavo Cathedral, erected from 942 and completed in Gothic style around 1275. Here the Mystic Lamb has reigned since May 6, 1432, date of its solemn installation. This 11.5-meter deployed polyptych reveals Hubert and Jan van Eyck's virtuosity, but also hides mysteries: why was the Righteous Judges panel specifically targeted in the 1934 theft? Cathedral archives mention suspicious nocturnal visits by German experts in the 1930s, fueling theories of international conspiracy.
Ghent's belfry, erected between 1313 and 1338, dominates the city from 91 meters and houses the claustrum since 1377, strongroom of urban privileges. These 366 steps lead to medieval communal power's heart, where Ghent bourgeois defended their autonomy against the counts. The 54-bell carillon added in the 16th century rang to announce public executions and religious festivities. Persistent legend claims the Van Eycks painted certain Mystic Lamb faces inspired by notables glimpsed from this tower, creating a secret portrait of Ghent society.
Ghent's town hall, begun in 1482 by the Bontinck architects, testifies to Flemish wealth during Charles V's era, born in this city in 1500. Its 82-meter facade adorned with 300 statues tells local history, but in its salons the Peace of Ghent was signed December 24, 1814, ending the Anglo-American war. Municipal chronicles reveal the child emperor came to admire Van Eyck works in the neighboring cathedral, developing this taste for Flemish art he would maintain throughout his European reign.
Your investigation concludes on Saint-Michael Bridge, rebuilt in 1905 in Art Nouveau style by Louis Cloquet. This 150-meter perspective on Graslei and Korenlei quays, classified since 1942, reveals Ghent's merchant soul: here grain and beer were unloaded since the Middle Ages. Contemplating these stepped-gable facades, you understand the environment that shaped the Van Eycks: prosperous bourgeoisie, international exchanges, sophisticated urban society. The Righteous Judges enigma then makes perfect sense: this stolen panel perhaps represented this Ghent elite's faces, making its theft all the more symbolic for the city.
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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Decipher secret messages hidden in primitive Flemish art
Relive the confrontation between the emperor and his birthplace
Explore witchcraft accusations linked to political resistance
Art sometimes hides the most beautiful resistance
Van Eyck and the rebels of Ghent
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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Uncover the mystery of Europe's most stolen altarpiece, Van Eyck's Mystic Lamb, whose panel remains missing since 1934.
1 purchase = 1 phone. Play several on the same device.
No calendar booking. Code sent immediately by email.
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12€. Collection exceptionnelle de primitifs flamands avec œuvres des Van Eyck et analyse technique de leurs pigments révolutionnaires.
14€. Instruments de torture médiévaux authentiques et reconstitution des geôles où les Van Eyck observaient les condamnés.
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💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.