Groningen — Silent Fissures Conspiracy
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Groningen, NetherlandsGroningen — Silent Fissures Conspiracy
📍 Groningen, Netherlands·🕐 2h30 – 3h·📍 ~2.8 km
Also available as:HistoricalMysterySpy thrillerCinema

Groningen — Silent Fissures Conspiracy

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

Difficulty
·From age 14 years
Starting point :Grote Markt, Groningen

In the heart of Groningen, the ground has trembled for decades—not from nature's fury, but from human greed

8
stages
~2.8 km
route
2h30 – 3h
at your pace
🚶
walking

Groningen — Silent Fissures Conspiracy

🎭Your Mission

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.

Far more than an escape game

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.

🏛️
Hidden historical gems

At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.

📜
Anecdotes & legends

Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.

🏗️
Architecture & heritage

Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.

🚶‍♀️
Immersive wandering

Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.

🎙️
Immersive audio narration

A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.

📲
Yours forever

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?

🏛️
Outdoor escape game

Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.

📱
On your smartphone

No app to download. Play directly from your browser. Guided step by step, at your own pace.

👨‍👩‍👧‍👦
Unlimited players

One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.

🎯
Augmented reality

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.

🤖
AI that helps you

Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.

🗣️
32 languages

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

Groninger Museumoptional
Around €16. Explore the modern, contemporary art and historical artifacts collections of Groningen city, housed in bold architecture.
Optionnel
/pers.
Noorderplantsoen Parkoptional
Free access. Relax in this 19th-century urban park, a national monument, offering a green setting and calm ponds.
Optionnel
/pers.
'Eierbal' Tastingoptional
Around €3-5. Taste this Groningen specialty, a breaded and deep-fried minced meat ball with a hard-boiled egg inside, typical of the Groningen region.
Optionnel
/pers.
Diepenring Canal Cruiseoptional
Around €12-15. Discover Groningen from another perspective by cruising on the historic canals surrounding the city center, offering a unique view of the monuments.
Optionnel
/pers.
Budget if you do them all / pers.~0
« It watches and is beautiful »
Motto of the city of Groningen

The story that haunts this land

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.

1959
Discovery of the Groningen gas field, one of the largest in the world.
1963
Start of commercial gas production, marking the beginning of an era of prosperity.
2012
The Huizinge earthquake (M 3.6) highlights the link between extraction and earthquakes.

The Route

8 stages through the city

The gameplay: AR, camera, hidden clues

📱Search clues with your cameraRA

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.

8
original puzzles
24
min of narration
🪙 24
TripCoins granted
16
GPS waypoints

How does it work with a group?

One phone = one team. Pick the number at checkout (1 to 10).

🧍
1 phone

Solo, or a group sharing the screen. One team, one code.

👥
2-3 phones

Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.

👨‍👩‍👧‍👦
4 to 10 phones

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.
🕒No date to pick · Code valid 1 year · Play whenever you want

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

Starting point
Grote Markt, Groningen
Directions on Google Maps
🕐
Duration
2h30 – 3h
At your own pace
👥
Players
Unlimited
From age 14
📍
Distance
~2.8 km
Historic center
Accessibility
Partial
Some cobbled streets
🌐
Languages
17 languages
Built-in translation

Why this route?

🌍

Secret Geology

Explore the mysteries of Groningen's subsoil and the geological forces at play.

🕵️‍♀️

Seismological Investigation

Follow the trail of induced earthquakes to reconstruct the timeline of events.

🏛️

Economic Conspiracy

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.

★ Innovation 2026

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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Did you play les fissures silencieuses groningen? Check the email you received after your game to leave a verified review.

Your turn to play

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.

12€
1 phone
23€
2 phones
33€
3 phones
42€
4 phones
50€
5 phones
56€
6 phones
62€
7 phones
68€
8 phones
74€
9 phones
80€
10 phones

1 purchase = 1 phone. Play several on the same device.

🕒No date to pick · Code valid 1 year · Play whenever you want
Get my code · 12€

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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