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Uncover the chilling mystery of sacrificed bodies hidden in Drenthe's ancient bogs. Decode clues across Assen's landmarks to expose the ritual killers and claim the cursed relic before the shadows claim you.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the misty bogs surrounding Assen, Drenthe Province harbors a dark secret from the Iron Age
You are a Royal Investigator, dispatched to Assen in the late 16th century by Stadhouder Willem Lodewijk.
Your mission: secure the province's heritage and unravel the mysteries buried
Delve into the millennia-old secrets of the Netherlands, where the Drenthe bogs still whisper tales of ancient civilizations and forgotten destinies.
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 quest begins at the Drents Museum in Assen, founded in 1854 as the provincial museum of Drenthe. The neo-Renaissance building, erected in 1907 by D.A. Benjamins, houses a permanent collection of 85,000 objects. This is where major discoveries are preserved, such as the bog bodies from Drouwenerzand, dating back to 530 BC, silent witnesses to ancient civilizations of the Drenthe peat bogs. Your first puzzle plunges you into these vestiges, searching for a clue hidden among the archaeological artifacts of the Netherlands.
Continue to the Abdijkerk, a church built between 1224 and 1250, part of the Cistercian monastery Mariënkamp. The 50-meter-high tower, rebuilt after a fire in 1791, and the 16th-century stained-glass windows, restored in 1950, tell the religious history of the province. Used as a parish church since 1600 after its secularization, it is a key Dutch National Monument. Here, you decipher a message hidden in the Gothic architecture, linked to the monks' influence on Drenthe's cultural heritage.
The route then takes you to the Brink, Assen's historic central square since the 13th century. A weekly market has been attested here since 1258 by a charter from the Count of Drenthe. This 12,000 m² square, surrounded by 36 listed Rijksmonumenten buildings, was a site of public execution until 1853. The Hof van Coevorden, an old comital palace rebuilt in 1551 and linked to the Battle of Anloo in 1227, stands nearby, its Dutch Renaissance gabled facade bearing witness to the establishment of provincial government. It is in this square that you must reconstruct an ancient proclamation, essential to your mission.
On your way to the Provinciehuis Drenthe, you cross the Wilhelminapark, created in 1897 for Queen Wilhelmina's jubilee. This 3.2-hectare park, with its 250 century-old trees and 1900 neo-classical pavilion, is a witness to Assen's urbanization at the end of the 19th century. The Provinciehuis itself, built in 1887-1888 by J.A. Beltman, has been the seat of the provincial government since 1888. Restored in 2005, it preserves its historic facade while incorporating modern innovations. A puzzle awaits you in its gardens, connecting nature to the governance of Drenthe.
Your exploration of Assen concludes at the Koepelkerk, built in 1882-1883 in a Neo-Romanesque style by A. Anastasius. Its central dome, 18 meters in diameter, and its 45-meter tower, listed as a monument in 1971, make it a Reformed edifice capable of accommodating 1,200 people. This thematic walking tour will have allowed you to grasp the history of Assen, from its medieval roots to its urban development. As Willem Lodewijk, you will have unlocked the "Shadows of the Bog," revealing the deep connections between Drenthe's heritage, its Rijksmonumenten, and the buried tales of its peat bogs. Your interactive visit to Assen concludes, the mysteries of the past forever etched in your memory.
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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Delve into the fascinating discoveries of bog bodies and the enigmas they pose about ancient Drenthe societies.
Decipher the clues to reconstruct a forgotten ritual calendar, revealing the practices and beliefs surrounding the sacrifices.
Explore Assen through the lens of its unique environment, where peat bogs have shaped the region's history and myths.
The bogs never forget.
Untangle the threads of a past frozen in time.
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 millennia-old secrets of the Netherlands, where the Drenthe bogs still whisper tales of ancient civilizations and forgotten destinies.
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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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
17,50€. Explorez les expositions permanentes et temporaires, notamment les momies de marais de Drouwenerzand.
Accès libre. Admirez les vitraux du XVIe siècle restaurés et la tour reconstruite après 1791.
Prix variables. Profitez du marché hebdomadaire attesté depuis 1258 pour goûter les saveurs de Drenthe.
Accès libre. Détendez-vous parmi les 250 arbres centenaires de ce parc créé en 1897 pour la reine Wilhelmina.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.