Monte-Carlo — Onassis's Secret Pact
Uncover Aristotle Onassis's secret pact that seized control of Monte-Carlo's casino empire. Decode clues hidden among glamorous landmarks to expose the financial plot behind the Rock.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1953, Greek shipping tycoon Aristotle Onassis launched a daring covert operation in Monte-Carlo
Monte-Carlo — Onassis's Secret Pact
You are a French secret service agent, on assignment in Monte-Carlo, 1963, tasked with deciphering the maneuvers of Aristotle Onassis, then at the peak of his power.
Your
Dive into the heart of Monte-Carlo, following in the footsteps of Aristotle Onassis, the Greek shipping magnate who reshaped the destiny of the Principality of Monaco.
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
« With God's Help »— Motto of the Grimaldi family
The story that haunts this land
Your quest for Onassis's Secret Pact begins at the Hôtel de Paris Monte-Carlo, a 35,000 m² edifice opened in 1864 for the wealthy clientele of the Monte-Carlo Casino. It was here that Aristotle Onassis, a regular guest, met Grace Kelly in 1959. This historic monument, classified as a Monument Historique, was the scene of so many decisive encounters for Monaco's future. From there, the Jardins des Boulingrins, laid out in 1873 and spanning 2 hectares, offer a green transition. Former English bowling greens until 1920, they are now a 500 m pedestrian path connecting the Casino to the port, with panoramic views of Port Hercule, a key site for understanding Onassis's hold on Monte-Carlo.
Port Hercule of Monaco, a natural harbor since antiquity and modernized in 1880, is your next stop. It was here that Aristotle Onassis established his fleet in 1953, creating 'Monte Carlo One' in 1963, strengthening his influence over the Principality. With its 1.5 km of quays and capacity for 700 berths and 100 yachts over 24 m, this port was the heart of his maritime operations. Nearby, the Yacht Club de Monaco, founded in 1953 by Prince Rainier III and whose Norman Foster building was inaugurated in 2014, bears witness to this era. Onassis, a founding member, regularly moored his yacht 'Christina O' here, a symbol of his power and status in Monte-Carlo's exclusive elite.
Continue your investigation along the Allée des Moulins, a paved alley typical of Monegasque urban fabric, near Avenue d'Ostende. Here, the remains of 16th-century windmills are integrated into the gardens overlooking Monte-Carlo. This essential passage, about 800 m long, connects the Casino to the Prince's Palace of Monaco. These discreet places, though, were trodden by countless influential figures, weaving the tapestry of Grimaldi Heritage long before Onassis's arrival, but also during his unofficial reign over the local economy. The atmosphere here is different, older, offering a perspective on the city's evolution.
Your journey then takes you to the Jardins Saint-Martin, created in 1815 by Honoré V. These 2 hectares of greenery, located between the Casino and the Palace, house the commemorative monument of the Italian capture of Monaco (1942-1943), a reminder of dark periods in Monegasque history. The Exoticarium, a little-known attraction from classic guides and installed in 1929, reveals an unexpected facet of this garden. These gardens offer a contrast to the opulence of the waterfront, a necessary meditative break to piece together Onassis's puzzle and understand the political and economic stakes of Monte-Carlo at that time.
Your mission concludes at the Cathédrale de l'Immaculée-Conception, consecrated in 1875 in a Romanesque style with a Genoese Neo-Romanesque facade. This logical final point, 1.2 km from the Place du Casino via the Rampe de la Major, houses the tombs of Prince Rainier III, who died in 2005, and Grace Kelly, who died in 1982. It is here, at the heart of the Grimaldi Heritage, that Onassis's story confronts that of the Principality. You will have explored Monte-Carlo, from its sparkling casinos to its places of contemplation, tracing the steps of a man who, through his ambition, left an indelible mark on this city-state, offering a unique interactive tour of Monaco's history.
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?
Financial Intrigue
Dive into the intricacies of international finance and stock market battles that shaped Monaco's destiny.
Maritime Heritage
Explore the crucial role of the sea and shipping in the rise and fall of Aristotle Onassis.
Royal Battle
Relive the epic duel between an ambitious Greek tycoon and a prince determined to protect his throne.
Power is the ultimate aphrodisiac.
The game for the Principality
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
Dive into the heart of Monte-Carlo, following in the footsteps of Aristotle Onassis, the Greek shipping magnate who reshaped the destiny of the Principality of Monaco.
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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