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Uncover the gas extraction conspiracy behind Groningen's silent fissures. Decode ignored warnings from the 1986 quake to expose the cover-up shaking the city to its core.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the heart of Groningen, the ground has trembled for decades—not from nature's fury, but from human greed
You are Coenraad van Beuningen, a 17th-century diplomat on a secret mission in Groningen.
Your task is to thwart a conspiracy threatening the Netherlands. Your investigation begins in
Delve into the ancient secrets of Groningen, a Hanseatic city where every cobblestone of the Grote Markt whispers the intrigues of merchants and bishops since the 13th century.
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
« It watches and is beautiful »— Motto of the city of Groningen
Your quest for silent fissures begins at the Goudkantoor, the Gold Office built in 1635 by architect Jacob van Campen. This classical baroque building, with 3 floors and a crowned pediment, was the center for gold transactions until 1821. Listed as a historic monument since 1967, it testifies to Groningen's commercial prestige. The whispers of merchants from yesteryear still seem to float around this facade where the secrets of the local economy were sealed. As Coenraad van Beuningen, you seek here the first traces of a financial discord that could shake the province of Groningen.
Next, your steps lead you to the Martinitoren, the Martini Church tower, a symbol of Groningen erected between 1479 and 1496. From its height of 97 meters, it houses a carillon of 97 bells, one of the largest in Northern Europe. Listed in the provincial monument register in 1969, this tower has watched over the city's destiny for centuries. It is here, under the imposing shadow of the Martinitoren, that you decipher the first coded communications, messages hidden in the carillon's resonances, revealing the ramifications of the conspiracy extending far beyond the city walls.
The path continues to the Academiegebouw, the main building of the University of Groningen, founded in 1614 by Johan van Leemkerck. Built by Philip Tideman, this Dutch classical style edifice, with its 45-meter facade and Renaissance pediment, was the seat of the first university in the Netherlands. As a diplomat, you explore the imaginary archives and libraries of this hub of knowledge, searching for clues among ancient texts. Groningen's intelligence and academic networks are mobilized to understand the deep motivations of the conspirators and prevent an uprising.
Your investigation takes you to the Provinciehuis Groningen, the provincial hotel built between 1772 and 1777 by Arent Tijdens R van Almelo. This neoclassical building with 156 rooms across 4 floors, covering a built area of 10,000 m², has been the administrative center of the province since the Napoleonic reorganization of 1814. Here, at the heart of power, you must intercept dispatches and unmask the traitors who have infiltrated the administration. The stakes are immense for Groningen's heritage and the stability of the Netherlands, and every official document can hold a key to your mission.
Finally, your journey through Groningen's heritage concludes at the Waag, the weighing house built in 1660, and the Pelstergasthuis, the pilgrims' hospital founded in 1392. The Waag, a 25-meter-high Dutch Renaissance architectural marvel, was used for weighing goods until 1977 and has been a national monument since 1967. The Pelstergasthuis, Groningen's oldest continuously operating hospital, with its inner courtyard and 18 wooden houses, still functions as a nursing home. These places, witnesses to daily life and solidarity in Groningen, reveal the human scope of the conspiracy. You understand that the silent fissures threaten not only institutions but also the very social fabric of this Hanseatic city. Your actions will have a direct impact on Groningen's history.
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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Explore the mysteries of Groningen's subsoil and the geological forces at play.
Follow the trail of induced earthquakes to reconstruct the timeline of events.
Unravel the political and economic interests that long suppressed the truth about gas.
The earth has its memory, and it does not forgive silences.
Unveil what the ground has long concealed.
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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Delve into the ancient secrets of Groningen, a Hanseatic city where every cobblestone of the Grote Markt whispers the intrigues of merchants and bishops since the 13th century.
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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Environ 16€. Explorez les collections d'art moderne, contemporain et d'artefacts historiques de la ville de Groningen, dans une architecture audacieuse.
Accès libre. Détendez-vous dans ce parc urbain du XIXe siècle, classé monument national, offrant un cadre verdoyant et des bassins calmes.
Environ 12-15€. Découvrez Groningen sous un autre angle en naviguant sur les canaux historiques qui entourent le centre-ville, offrant une perspective unique sur les monuments.
Environ 3-5€. Goûtez à cette spécialité groningoise, une boule de viande hachée panée et frite avec un œuf dur à l'intérieur, typique de la région de Groningen.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.