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Decipher a hidden merchant's ledger to expose the truth behind Mackinac Island's fur trade fortune and the conspiracy that buried it.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the shadow of Fort Mackinac, a scandal was erased
You are Lewis Cass, Michigan Territory Governor in 1820, on a mission to consolidate American commercial interests on Mackinac Island, a strategic crossroads of the Great Lakes.
Your quest: to find
Uncover Mackinac Island's commercial past, from 19th-century traders to Fort Mackinac's military secrets that shaped Michigan.
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 on Main Street, the commercial heart of Mackinac Island, established in the 19th century as a center for trade and commerce. By 1875, this street was already bustling with shops and galleries, reflecting the island's flourishing tourist and mercantile economy. As Lewis Cass, you examine the historic facades, searching for clues left by former merchants. It is here, the official starting point for guided tours, that the first leads to the Forgotten Great Ledger are revealed, hidden in architectural details or period signs. The history of Mackinac Island's commercial transactions comes alive before your eyes.
Continue towards Fort Mackinac, a military fortification built in 1780-1781 by the British, located 320 feet above Mackinac Island. This site strategically controlled the Straits of Mackinac and Great Lakes trade routes from the 18th century. As governor, you understand the military importance of this site for the island's possession and trade regulation. The fort, now a Michigan State Museum, documents the region's military, commercial, and civil history, offering insight into the power struggles that marked Mackinac Island. Archival documents here could reveal crucial information about past trade agreements.
Your journey leads you to the Dr. William Beaumont Museum, dedicated to this revolutionary military physician (1785-1853) stationed at Fort Mackinac. Between 1822 and 1833, Beaumont conducted pioneering studies on human digestion, fundamental to modern physiology. The preserved historic building documents these 19th-century scientific and medical contributions. While the focus is on medicine, records of provisions or military correspondence might contain indirect information about Mackinac Island's commercial flows and influential figures of that era, clues for your quest.
Exploring the Richard and Jane Manoogian Mackinac Art Museum, located in a historic residence, you discover a collection of American art reflecting the cultural and artistic history of the Great Lakes region. This stop allows you to appreciate the island's cultural and commercial heritage from another angle. The artworks and documents displayed could depict scenes of mercantile life or portraits of key figures linked to Mackinac Island's trade, offering unexpected perspectives on the secrets of the Forgotten Great Ledger. Every painting, every art object, is a window into the past.
Your journey concludes at Marquette Park, a historic public space named in honor of Father Jacques Marquette, a 17th-century Jesuit explorer. This park is a historical gathering place and an observation point for the Straits of Mackinac and its trade routes. It is here, facing the expanse of the Great Lakes, that you piece together the puzzle. Information gathered on Main Street, at Fort Mackinac, and through the museums connects, revealing the true scope of the Forgotten Great Ledger and the commercial influences that forged Mackinac Island, a pillar of Michigan's heritage. You leave with a deep understanding of the island'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.
Ready to live this adventure?
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Delve into the ghost stories and unexplained events that haunt Mackinac Island's historic sites.
Explore the military legacy of American and British conflicts surrounding Fort Mackinac.
Reconstruct the economic and cultural importance of the fur trade that shaped the island's destiny.
History Whispers
Decipher the ledger, pierce the mist.
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 Mackinac Island's commercial past, from 19th-century traders to Fort Mackinac's military secrets that shaped Michigan.
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.
Entrée payante. Explorez les remparts et les bâtiments du fort pour une immersion complète dans l'histoire militaire et commerciale de Mackinac Island.
Entrée payante. Découvrez les travaux pionniers du Dr. Beaumont sur la physiologie humaine, un pan essentiel de l'histoire scientifique du Michigan.
Prix variable. Goûtez au célèbre fudge de Mackinac Island, une tradition gourmande qui remonte aux débuts du tourisme sur l'île.
Accès libre. Admirez cette formation géologique naturelle de 146 pieds de hauteur, un repère historique pour la navigation commerciale sur le Détroit de Mackinac.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.