Monaco-Ville — Decode the Grimaldi Cipher
Uncover the hidden code embedded in Monaco's sculptures. A centuries-old Grimaldi secret lies encrypted in plain sight—decipher the monuments before midnight.
📱 1 to 10 phones · 1 team per phone · Independent codes
For seven centuries, the Grimaldi dynasty has ruled Monaco from its fortress perched above the Mediterranean
Monaco-Ville — Decode the Grimaldi Cipher
You are a royal archivist, commissioned by Prince Albert I of Monaco in the early 20th century, tasked with recovering fragments of a forgotten code that ensures the Principality's prosperity.
Your
Decipher the secrets of the Grimaldi House and unlock the "Monegasque Cipher" that has protected the Principality since the 17th century, in the heart of Monte-Carlo.
A game, a guided tour and a heritage guide — all in one
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. »
How does it work?
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.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
« Monaco is where the earth meets the sky and where history breathes on every street corner. »— Prince Rainier III
The story that haunts this land
Your quest for the Grimaldi Cipher begins on the Place du Casino in Monte-Carlo, an area laid out in 1863, simultaneously with the Casino's opening. Here, the central fountain, built in 1910 and restored in 2003 according to Monaco City Hall archives, guides you to the first clues. The Casino de Monte-Carlo, built between 1856 and 1863 by architect Charles Garnier and inaugurated on December 14, 1863, reveals its Belle Époque style facade with 28 Corinthian columns and a total height of 56 meters. This historic monument in Monaco, which generated 90% of the Principality's revenue in the 19th century, is a key point in your investigation of 19th-century architectural heritage.
In the Jardins du Casino, also known as the Jardins Boulingrins, laid out in 1863 by landscape architect Édouard André over an area of 8,000 m², you discover botanical richness. The 2015 inventory lists 2,400 tropical and Mediterranean plant species. These terraced gardens, cascading towards the Mediterranean and restored in 2008, provide a setting conducive to reflecting on the Grimaldi House's motto "Deo Juvante". Nearby, the Opéra de Monte-Carlo, or Salle Garnier, built in 1879 by Charles Garnier and integrated into the Casino, awaits you. It hosted its first performance, Rossini's Semiramide, on January 25, 1879, with its 900 seats and a stage measuring 54 m × 32 m.
The Hôtel de Paris Monte-Carlo, built in 1864 by architect Franchi and inaugurated on July 15, 1864, stands as a testament to Monte-Carlo's opulence. Initially boasting 150 rooms, it now has 182 suites and rooms. The equestrian statue of Louis XIV by Franceschi, gracing the entrance since 1867 and restored in 1995, is a central element of your Monte-Carlo treasure hunt. This stop invites you to decipher symbols related to royalty and the Grimaldi House's influence on this world-class tourist site. The Allée des Boulingrins, lined with trees, leads you to further clues in this Monte-Carlo themed circuit.
As you continue your exploration, the Terrasses du Casino and the Pavillon des Arts, both with free access, offer perspectives on the evolution of Monte-Carlo's heritage. These places, although more contemporary than the 19th-century buildings, are part of the Principality's history and its development under the aegis of the Grimaldi House. They represent the continuity of an urban vision, initiated by figures such as Prince Rainier III, restorer of the Principality, and Prince Albert I, founder of the Musée océanographique de Monaco in 1910. Every architectural or landscape element brings you closer to solving the Grimaldi Cipher.
Your journey in Monte-Carlo, a true outdoor escape game, culminates at the Casino de Monte-Carlo, where all the code fragments come together. This interactive Monte-Carlo visit will have led you through emblematic sites, from the Jardins Boulingrins to the Casino facades, for a deep understanding of Monte-Carlo's history. You take away not only the satisfaction of having deciphered an ancient secret but also an intimate knowledge of the Principality's architectural and cultural heritage, a legacy shaped by personalities like Charles Garnier and Édouard André. This exploration is an immersion into the soul of Monaco, where every stone whispers "Deo Juvante".
The Route
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.
How does it work with a group?
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.
- ✓All codes are independent — play at the same time OR separately, each team advances at its own pace.
- ✓Leaderboard between your teams + global game leaderboard — each score appears in the public ranking.
- ✓More than 10 phones or need a personalized quest? Discover custom tours.
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
Practical info
Why this route?
Architectural Grandeur
Explore Charles Garnier's masterpieces, from the Opera to the Casino.
Belle Époque Luxury
Immerse yourself in the opulent atmosphere that made Monte-Carlo famous.
Engraved Secrets
Decipher the clues hidden in stone and lush landscapes.
The genius of the place revealed.
Every detail of the Casino whispers the story of its fortune.
9 features nobody else has
OddballTrip combines gamified play, augmented reality and AI. All our competitors deliver 1 or 2 of these angles. We deliver all 5.
AR treasure chest
A golden chest floats in front of the monument. Tap → opening animation → reveals a secret message.
AR narrator character
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.
Magic golden letters
At the puzzle climax, golden letters magically write themselves on the real wall — that's the puzzle answer. An unforgettable visual effect.
Written + audio narration
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.
360° radar + vibration
A mini-radar shows the target even behind you, and the phone vibrates when you aim in the right direction.
Heritage storytelling
Every puzzle weaves in real historical facts (architecture, era, anecdotes). You learn by playing — like a gamified audioguide.
Progressive AI hints
3 levels of AI-generated help: vibe → where to look → answer format. You're never stuck.
AR selfie memento
At the end of the game, capture a selfie with OddballTrip banner + mascot, shareable on Instagram, TikTok.
Zero app to install
PWA technology: open the link, it plays in your browser. Same quality as an app, no App Store hassle.
Frequently asked questions
Q01Do I need to download an app?
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.
Q02Does it work offline?
GPS yes (handled by your phone). Maps yes (tiles cached). AI and hints need an intermittent 4G connection.
Q03How long does a game take?
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.
Q04What happens if I'm stuck?
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).
Q05What's the age range?
From 12 without an adult, from 6 with an adult reading puzzles. Works for families, couples, friend groups, companies.
Q06What if my city isn't in the catalogue?
Pre-register or contact us — we'll email you as soon as your city is live.
Q07What is augmented reality exactly?
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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Your turn to play
Decipher the secrets of the Grimaldi House and unlock the "Monegasque Cipher" that has protected the Principality since the 17th century, in the heart of Monte-Carlo.
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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