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Decipher coded ledgers and rival faction secrets to expose the hidden power struggle that shaped the fur trade empire on the Mississippi.
📱 1 to 10 phones · 1 team per phone · Independent codes
Prairie du Chien, 1815
You are a trade intelligence agent, operating in Prairie du Chien in 1840 to uncover the secret networks that shaped the Wisconsin fur trade.
Your mission: reconstruct the map of alliances
Delve into the layers of time in Prairie du Chien, where echoes of the fur trade and battles for Mississippi control still resonate.
Prairie du Chien, the starting point of your investigation, was a major strategic stake. The Fort Crawford Museum, built in 1816 by Americans as Fort Shelby, aimed to secure the fur trade at the confluence of the Mississippi and Fox-Wisconsin rivers. Renamed Fort Crawford the same year after the Battle of Prairie du Chien in 1814, it controlled the passage to St. Louis during the War of 1812. The remains of the second fort from 1829-1856, with its limestone blocks, testify to this struggle for territorial control, an open-air archaeological site revealing the beginnings of the American economy in Wisconsin.
Your journey then leads you to Calvary Cemetery, established around 1835. This eternal resting place holds the graves of early fur traders and French families who shaped Prairie du Chien's history. You will find the burials of settlers who arrived before 1740, such as Jean-Marie Cardinal and Elizabeth Pelletier Antaya. This cemetery, located 0.5 km from the Fort Crawford Museum, also includes remains linked to the DesChiens families, who gave their original name to the prairie around 1740, revealing the deep roots of the French-speaking community involved in the fur trade as early as 1685.
Villa Louis, a historic mansion built in 1873 by Louis Dousman, son of magnate Hercules Dousman, illustrates the wealth accumulated through the 19th-century fur trade. This 16-hectare property, with its gardens and museum, recreates the life of Wisconsin fur merchants. Designated a National Historic Landmark in 1968, this site highlights the Dousman family's dominant role in trade with indigenous peoples and their impact on the post-1814 economy, an essential step in understanding the power of the era's traders in Prairie du Chien.
The exploration continues along the Mississippi River, the main route for the fur trade since 1673. It was here that Marquette and Jolliet explored the river on June 17, 1673, near Prairie du Chien, then uninhabited. The confluence with the Fox River, a strategic point disputed in 1814, connected the Great Lakes to Missouri. The prairie, stretching 14.5 km above this confluence, was the site of the first French post, Fort Saint-Nicolas, erected by Nicolas Perrot in 1685. This riverside area is a key to understanding the Fur Trade History Trail and the Wisconsin Historical Society's river heritage.
Finally, your investigation leads you to the Dousman Hotel, a luxury hotel built in 1853 by Hercules L. Dousman. This Italianate-style building, with its 40 rooms, served as the social hub of the fur trade village until 1864, accommodating travelers, traders, and military personnel near the Mississippi. Its proximity to St. Gabriel's Catholic Church, founded in 1831 and serving French-speaking and indigenous communities, and its connection to the DesChiens family, early Norman settlers who arrived around 1740, paint a complete picture of Prairie du Chien's urban and economic life. Your journey through these Wisconsin monuments will leave you with a deep understanding of Prairie du Chien's history and the Mississippi River Heritage.
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
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?
Get my code · 12€No calendar booking. Code sent immediately by email.
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Decipher the secret routes of the fur trade and contested territories.
Examine artifacts and merchant documents to reveal hidden alliances.
Follow the trails along the mighty Mississippi, silent witness to so many exchanges.
The Mississippi's brown gold.
Power was measured in pelts, not nuggets.
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 layers of time in Prairie du Chien, where echoes of the fur trade and battles for Mississippi control still resonate.
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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💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.