🕒 No date to pick · Code valid 1 year · Play whenever you want
Get my code
Decode the secret alphabet Rousseau hid across Geneva's Old Town before his manifesto burned. Uncover the cipher that could rewrite Enlightenment history.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1762, Jean-Jacques Rousseau's 'Emile' ignited fury in Geneva
You are an archivist for the Academy of Geneva, in 1728, tasked with locating a crucial missing document.
Your mission: uncover an unpublished manuscript by Jean-Jacques Rousseau, which vanished
Delve into Old Geneva's alleys to decipher the forgotten secrets of Jean-Jacques Rousseau, Enlightenment philosopher and prodigal son of the Lake Geneva city.
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
« After darkness, light »— Motto of the Genevan Protestant Reformation, official motto of Geneva and inscription engraved on the Reformation Wall (1909) and Saint-Pierre Cathedral
Your investigation begins on Rue Jean-Jacques Rousseau, a historic thoroughfare in the Saint-Gervais district, showcasing typical Genevan architecture with its stone facades. It is in this heart of Geneva's reformist heritage that Rousseau spent his childhood and youth before his departure in 1728, at the age of 15. The city's past, between notables and merchants of the Ancien Régime, unfolds here, laying the groundwork for the critical spirit that would mark the philosopher's work. You explore the places that forged his early reflections, where young Jean-Jacques may have sketched the beginnings of 'The Social Contract'.
The Hôtel de Ville de Genève, constructed between 1455 and 1609, is your next stop. This administrative building, seat of the Council of State and the Municipal Council since 1455, features a unique ramp without steps, an architectural innovation from 1617 used for official processions. It was here that Geneva's civic decisions, as the capital of the Reformation, were made, influencing Jean-Jacques Rousseau's life and the city's destiny. The coats of arms and inscriptions adorning its facade tell centuries of governance, offering insight into the institutions that shaped the political and social context of Rousseau's youth.
The Cathédrale Saint-Pierre de Genève, whose construction began in 1160 and was completed in 1535, is a major historical monument. Jean Calvin preached here starting in 1541, making this late Gothic and Renaissance edifice the seat of the Genevan Protestant Reformation. With its 42-meter-high main nave, it symbolizes the intellectual and spiritual power that permeated Geneva. The inscription 'Post tenebras lux' on its north portal, the motto of the Genevan Reformation, still resonates. This place of worship and power is a pivot in Geneva's history, offering a contrast to Rousseau's later ideas.
Your journey leads you to Place du Bourg-de-Four, the oldest square in Geneva, attested since the 12th century. A former grain market and administrative center, its 16th-17th century arcades and partially preserved period stone paving testify to its central role. This public and commercial gathering place was the seat of Genevan civic life during the Reformation, a crossroads where ideas circulated and where young Rousseau undoubtedly witnessed the debates that animated his hometown. The central fountain, restored in 1863, adds to the historical atmosphere of this medieval district.
Finally, Île Rousseau, a small artificial island on Lake Geneva created in 1821, marks the culmination of your exploration. Accessible by two bridges from the left bank, it hosts a commemorative monument dedicated to Jean-Jacques Rousseau (1712-1778). This historic promenade site since the 19th century offers a serene view, inviting reflection on the philosopher's legacy. Your quest for Rousseau's forgotten cipher will have led you through Geneva's monuments, from Calvin's Auditorium where the reformer taught, to the Reformation Wall commemorating Guillaume Farel and Théodore de Bèze. You leave with an intimate understanding of Geneva's history, its UNESCO heritage, and the life of one of its most illustrious citizens.
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.
🔒 Secure payment · Code in 5 min · Free cancellation
Dive into Jean-Jacques Rousseau's revolutionary ideas and their influence on modern thought.
Explore the tensions between ideals of liberty and the political reality of 18th-century Geneva's Republic.
Relive the fate of a persecuted philosopher, forced into exile for his writings, but whose legacy endures.
Uncover the hidden legacy of the Citizen of Geneva!
Between the lines and the stones, Rousseau left you a message.
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.
Soyez le premier à partager votre expérience.
Did you play l alphabet oublie de rousseau? Check the email you received after your game to leave a verified review.
Delve into Old Geneva's alleys to decipher the forgotten secrets of Jean-Jacques Rousseau, Enlightenment philosopher and prodigal son of the Lake Geneva city.
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
More ideas for self-guided walking tours, scavenger hunts & city quests in the same city

Uncover the hidden Cold War spy network that operated from Geneva's shadows. Decode clues from Reformation-era sites to expose traitors and reclaim a lost microfilm before it's gone forever.

Uncover the secret manuscript hidden during the stormy night at Villa Diodati when Frankenstein was born. Decode clues across Cologny to expose the truth before it's lost forever.

1553: Uncover the hidden code in Michel Servetus' final breath, smuggled out before his execution at Champel. Decode the heretic's forbidden truth that defied Calvin and shook Geneva forever.

Uncover the hidden archives of the League of Nations buried in Geneva's cellars. Decode a forgotten protocol that could rewrite interwar history before it's lost forever.

Geneva, 1553: Uncover the Consistory's secret trial. Decode clues from Reformation landmarks to expose a forbidden manuscript and save a heretic's life before the shadows claim another victim.

Uncover the conspiracy that silenced Henry Dunant, founder of the Red Cross, after his bankruptcy scandal. Decode clues across Geneva's historic heart to expose the betrayal that drove him into exile.
Between medieval castles and sun-drenched vineyards
Between lake and mountains, the pearl of the Swiss Jura.
UNESCO watchmaking city, between art and precision
Medieval city and federal capital, guardian of the bear
European crossroads, city of art and culture on the Rhine.
Between lake and mountains, a Swiss medieval jewel
Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
Gratuit. La plus ancienne maison privée de Genève, un témoignage de l'architecture médiévale et de la vie quotidienne genevoise.
25-40€. Savourez une fondue traditionnelle dans un des restaurants historiques de la Vieille Ville de Genève, avec vue sur la Place du Bourg-de-Four.
20-50€. Admirez les Alpes et le Jet d'eau de Genève depuis le lac, une perspective différente sur la Promenade de la Treille.
13€. Explorez l'histoire de la Réforme protestante genevoise, de Jean Calvin à ses répercussions mondiales.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.