🕒 No date to pick · Code valid 1 year · Play whenever you want
Get my code
Uncover Prince Rainier III's secret counter-offensive against post-WWII threats and hidden Nazi fortunes. Decode clues across iconic landmarks to expose the conspiracy that nearly toppled the Principality.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the shadow of World War II, as Allied forces liberated Monaco in September 1944, vast Nazi fortunes—equivalent to hundreds of millions today—were secretly stashed in Monte-Carlo's banks and villas
You are Jean-Charles Rey, private advisor to Prince Rainier III in 1956, arriving in Monaco-Ville the day after the royal wedding with Grace Kelly.
Your secret mission
Retrace Prince Rainier III's epic journey as he saved Monaco from bankruptcy by transforming Monte-Carlo into the world's glamour capital between 1949 and 1982.
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
Monaco-Ville welcomes you to Place du Palais where Rainier III was enthroned on April 11, 1950, inheriting a principality on the brink of bankruptcy. The 26-year-old prince discovered depleted finances: Monte-Carlo Casino was losing money, wealthy tourists were deserting the Riviera for emerging Saint-Tropez. From the Rock's ramparts, you observe Port Hercule below, then a simple fishing port with 200 moorings that Rainier dreamed of transforming into a prestige marina. The Major Ramp, monumental staircase from 1714, leads you to the Oceanographic Museum inaugurated in 1910 by Albert I. This temple of marine science became under Rainier III a symbol of modernity, attracting 600,000 annual visitors by 1960.
Saint-Martin Gardens, terraced since 1816, offer a commanding view of Rainier's urban strategy. In 1959, the prince launched Operation Fontvieille: reclaiming 22 hectares from the sea to double Monaco's surface area. You descend toward Port Hercule, enlarged in 1971 with the new Rainier III basin 6 to 10 meters deep. This revolutionary marina can accommodate 700 yachts including some 175 meters long, transforming Monaco into the world capital of luxury yachting. Avenue d'Ostende, opened in the 1960s, now directly connects the port to Monte-Carlo district, bypassing the old maze of narrow streets.
Hôtel de Paris Monte-Carlo, Second Empire palace opened in 1864, became under Rainier the symbol of Monaco's renewal. In 1962, the prince received Winston Churchill there, who stayed in the Rose Salon decorated by Baccarat. The 182 rooms now welcomed Aristotle Onassis and Maria Callas in the 1950s-1960s, emblematic couple of the international jet set that Rainier attracted through his revolutionary tax policy. The absence of income tax, established in 1869 but relaunched by Rainier, made Monaco a legal tax haven that seduced European and American fortunes.
Monte-Carlo Opera House, Garnier Hall inaugurated January 5, 1879, was reborn under the impetus of Rainier and Grace Kelly. The American princess, former Hollywood star, transformed this 524-seat hall into an international cultural showcase. Restored for 100 million euros between 2017 and 2019, the opera preserves its frescoes by Gustave Doré and its 8 royal boxes where European crowned heads parade. The Casino Gardens, 7 hectares of exotic terraces designed by Joseph Comboul from 1864, became the theater of princely receptions that built Monte-Carlo's worldwide reputation.
Your mission ends before Monte-Carlo Casino, Charles Garnier's neo-baroque jewel saved by Rainier from decrepitude. Between 1950 and 1982, the prince transformed this 19th-century symbol into a 20th-century dream machine. The 107-meter facade with 28 Corinthian columns now attracts 300,000 annual visitors, generating revenues that financed Monaco's metamorphosis. You take away the keys to a unique urban revolution: how a 2 km² micro-state became in three decades the showcase of European luxury, laboratory of futuristic urbanism and legal tax haven admired worldwide.
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
Follow the journey of Prince Rainier III as he fights to regain control of his country against powerful foreign interests.
Uncover the political maneuvers and legislative strategies used to outwit a formidable adversary.
Explore the places that embody Monaco's renewal under the impetus of Rainier III, far from gambling clichés.
Patience is a virtue and perseverance is a key.
A Prince's Victory
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 le contre offensive de rainier? Check the email you received after your game to leave a verified review.
Retrace Prince Rainier III's epic journey as he saved Monaco from bankruptcy by transforming Monte-Carlo into the world's glamour capital between 1949 and 1982.
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 Manuscript of Forgotten Funds, a coded ledger exposing Monte-Carlo's secret financial empire. Decipher clues across the casino district to reveal the conspiracy before it's buried forever.

Uncover the hidden code embedded in Monaco's sculptures. A centuries-old Grimaldi secret lies encrypted in plain sight—decipher the monuments before midnight.

Uncover the hidden code Joseph Wells used to break the bank at Monte-Carlo Casino. Follow his secret path through sculptures and statues concealing clues to his untold fortune and escape.

Uncover the sinister secrets of a Monaco prince's hidden fortune and deadly political plots. Decode clues across opulent landmarks to expose betrayals before the legacy claims another victim.

Uncover the secret wager that forged Monaco's fortune. Decode clues hidden in the Prince's Palace and ancient streets to reveal if the legendary bet was won or lost forever.

Uncover the cursed Serpent emblem hidden during the 1929 Grand Prix. Decode clues at iconic landmarks to expose a sabotaged legend before its dark prophecy strikes again.
Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
16€. Aquarium spectaculaire avec 6000 espèces marines et expositions temporaires sur les expéditions d'Albert Ier.
10€. Appartements d'État et salle du trône où Rainier III recevait les chefs d'État, ouverts d'avril à octobre.
45€. Brasserie mythique face au Casino depuis 1868, spécialités de fruits de mer et vue sur la place du Casino.
Gratuit. Parcourez à pied les 3,337 km du circuit mythique, de Sainte-Dévote au virage du Portier.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.