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Decode the cryptic clues hidden in Mark Twain's boyhood haunts to unravel a long-buried family secret that inspired Tom Sawyer and haunted Hannibal's shadowy past.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the sleepy river town of Hannibal, Missouri, young Samuel Clemens—better known as Mark Twain—roamed the streets from 1844 to 1853, absorbing tales of mischief, adventure, and hidden dangers that fu
You are a literary journalist on assignment in 1870s Missouri, tasked with unearthing the origins of Samuel Langhorne Clemens' genius.
You arrive in Hannibal, future Mark Twain'
Walk the cobblestone streets of Hannibal where Mark Twain grew up from 1844 to 1853, in the house that inspired Tom Sawyer and Huckleberry Finn.
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
Hannibal awakens in 1819 as a river port on the Mississippi, but it's the arrival of the Clemens family in 1839 that seals its literary destiny. Samuel Langhorne Clemens is born in Florida, Missouri, on November 30, 1835, but grows up in this red brick house built in 1843-1844 at 120 N Main Street. From 1844 to 1853, the future Mark Twain observes from his window the steamboats, merchants, and escaped slaves heading north to free states. This childhood by the great river already nourishes the imagination of one who would write: 'The Mississippi is always the same water flowing, but it's never the same river.'
The Becky Thatcher House, built around 1840 at 200 N Main Street, houses Laura Hawkins, Samuel's childhood neighbor and friend. This blonde-haired girl directly inspires the character of Becky Thatcher in The Adventures of Tom Sawyer, published in 1876. Twain describes their friendship: 'Laura was my first flame, and I hers; we were engaged, and our parents approved.' The restored house preserves period interiors where the future writer's first emotions unfold, transformed thirty years later into universal literary romance.
The white fence of the Clemens property, dating from the 1840s, becomes mythical in 1876 with Tom Sawyer's publication. This wooden picket fence, restored in 2016 to preserve its authentic appearance, immortalizes the scene where Tom transforms a painting chore into an enviable game for his friends. Twain develops his philosophy there: 'Work consists of whatever a body is obliged to do, and play consists of whatever a body is not obliged to do.' This lesson in childhood psychology, born on N Main Street, crosses generations.
The Mississippi docks, active since the 1830s, offer Samuel Clemens his river university. From 1857 to 1861, he becomes a steamboat pilot on this river one kilometer wide, learning by heart its meanders, sandbars, and treacherous currents. This experience forges his pseudonym 'Mark Twain' (safety depth for navigation) and inspires The Adventures of Huckleberry Finn in 1884. The Mississippi becomes the central character of his work: 'There is nothing more beautiful than a river flowing toward infinity.'
Your journey through Hannibal reveals how a childhood by the Mississippi shapes America's first great writer. Samuel Clemens leaves his hometown in 1853 but returns in imagination to create Tom Sawyer and Huckleberry Finn, characters who embody eternal America of childhood and adventure. Designated National Historic Landmark in 1962, this Main Street district preserves intact the setting of this literary genesis. You take away the certainty that the greatest works often arise in the simplest places, when a curious child observes the world from his window.
5-10 curated sites across the territory
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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Walk in the footsteps of Mark Twain and his iconic characters through Hannibal's historic sites.
Solve riddles inspired by Mark Twain's novels and life, revealing a forgotten secret.
Follow the course of the Mississippi for a quest full of twists and turns, worthy of Tom Sawyer and Huck Finn.
The river's secrets whisper
Only the daring hear them.
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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Walk the cobblestone streets of Hannibal where Mark Twain grew up from 1844 to 1853, in the house that inspired Tom Sawyer and Huckleberry Finn.
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
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
12$. Collections d'objets personnels de Twain, manuscrits originaux et reconstitution de l'imprimerie où il a travaillé adolescent.
20$. Visite guidée de la grotte qui a inspiré les aventures de Tom Sawyer, avec galeries souterraines et formations calcaires du Missouri.
35$. Spécialités du Missouri : côtes de porc fumées, catfish du Mississippi et tarte aux noix de pécan, dans l'ambiance des bateaux à vapeur.
25$. Navigation d'1h30 sur un bateau à aubes authentique, avec commentaires sur l'époque des pilotes de rivière et vue sur Cardiff Hill.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.