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Decipher the hidden messages left by Paul Revere's Midnight Riders and Minutemen. Uncover the conspiracy that sparked the American Revolution in this historic heart.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the tense night of April 18, 1775, Paul Revere and the Midnight Riders galloped through Concord Center, spreading the alarm: 'The British are coming
Step into the shoes of Paul Revere, the alarm rider of 1775, tasked with delivering crucial messages to the American militiamen. Your mission takes you through picturesque Concord Center, a Historic District in Concord, MA, where every cobblestone and facade whispers echoes of the American Revolutionary War. On your phone, augmented reality clues reveal themselves: military maps from April 19, 1775, appear on the walls of Wright's Tavern, Minutemen figures emerge in Monument Square, and engraved letters from Ralph Waldo Emerson's 'Concord Hymn' light up on historical sites. Over approximately 135 minutes of walking a 1.5 km route, no car needed, you explore the Revolutionary War Sites at the heart of this Massachusetts heritage at your own pace. More than an outdoor escape game: an interactive tour immersed in 249 years of history, with anecdotes revealed at each stop and confidential sites that classic guides overlook.
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
« By the rude bridge that arched the flood, Their flag to April’s breeze unfurled, Here once the embattled farmers stood, And fired the shot heard round the world. »— Ralph Waldo Emerson, Concord Hymn, 1837
Your journey begins at Minute Man National Historical Park, a national park established in 1959 spanning 970 acres along Battle Road. This site, connecting Lexington to Concord, was the scene of the battle on April 19, 1775. Here in Massachusetts, you walk in the footsteps of the Minutemen who confronted the British. The Visitors Center, opened in 1974, houses artifacts from this foundational battle, attracting an average of 77,000 annual visitors. It was also in this historic setting that Ralph Waldo Emerson wrote his 'Concord Hymn' in 1837, commemorating the event.
Your route then takes you to The Old Manse, a colonial house built in 1770 by Reverend William Emerson, Ralph Waldo Emerson's father. This Georgian-style residence, with its 11 rooms over 2,300 sq m, was Nathaniel Hawthorne's home from 1842 to 1845, where he drew inspiration for his short stories. Listed on the National Register of Historic Places in 1966, it is surrounded by a garden created by Henry David Thoreau in 1842 for the Hawthornes. This site illustrates the intellectual and literary heritage of Concord, Massachusetts, closely linked to the events of the Revolution.
Cross the North Bridge, a bridge rebuilt in 1956 on its original 1760 foundations. It was here, on April 19, 1775, that the first battle of the American Revolutionary War erupted. 400 British soldiers were repelled by 500 American militiamen, marking the first armed confrontation of the Revolution. This wooden arch bridge, about 15 meters long, is a centerpiece of the Minute Man National Historical Park, established in 1959. The "shot heard 'round the world" still echoes on this crucial site for United States history.
Continue your visit to Wright's Tavern, a tavern built in 1729-1730. On April 19, 1775, it served as headquarters for British officers before the battle, and was also a meeting place for American militiamen that very morning. Named for Ephraim Hartwell and then Samuel Wright, this two-story wooden building, 18 x 12 meters, was restored in 1927 by the Colonial Dames of America and listed on the National Register of Historic Places in 1972. It embodies the fervor of Concord before the conflict, a key point of interest for understanding Massachusetts heritage.
Your adventure concludes at Monument Square, the central plaza of Concord Center, surrounded by 18th-century buildings. It was here that the Minutemen gathered on April 19, 1775, before marching to North Bridge. Daniel Chester French's Minute Man statue, erected in 1875 and 2.1 meters tall, commemorates their bravery. Bordered by the Concord Free Public Library, opened in 1873 with its 150,000 works, and the First Parish in Concord where William Emerson preached, this square is the vibrant heart of the Historic District listed in 1972. Your journey will have allowed you to grasp the essence of Concord and its foundational role in American 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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Uncover coded messages and battle plans hidden by the patriots.
Understand the tactics of the Minutemen against the British army.
Walk through the places where the American Revolution took off.
Be the messengers of liberty!
History is in your hands.
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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Relive the day America fired the "shot heard 'round the world" in Concord, Massachusetts, on April 19, 1775.
1 purchase = 1 phone. Play several on the same device.
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More ideas for self-guided walking tours, scavenger hunts & city quests in the same city

Decipher the hidden choices that led Franklin Pierce to ignite 'Bleeding Kansas' and fracture a nation. Uncover the conspiracy of silence in his final refuge.

Outwit British patrols and decipher the hidden codes Paul Revere left during his midnight ride. Solve the mystery of his capture and the lost alarm signals that sparked the Revolution.

Decipher the Minutemen's hidden code from 1775, etched in landmarks around Concord. Uncover the encrypted intelligence that sparked the Revolution before a traitor's plot erases it forever.
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
15$. Explorez la maison où Louisa May Alcott écrivit 'Les Quatre Filles du Docteur March', imprégnez-vous de l'atmosphère littéraire du XIXe siècle à Concord.
8$ par voiture. Visitez le lieu qui inspira Henry David Thoreau pour son œuvre 'Walden', un site naturel protégé offrant des sentiers de randonnée et une plage.
Prix variés. Dégustez des plats américains traditionnels dans un cadre historique datant de 1716, avec plusieurs salles à manger thématiques.
20$. Participez à une visite à pied guidée explorant les maisons et les lieux de vie des figures littéraires majeures de Concord, comme Emerson, Thoreau et Hawthorne.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.