Monaco-Ville — Grimaldi Secrets
Uncover the encrypted secrets of the Grimaldi dynasty hidden in Monaco-Ville's ancient stones. Decode clues from the fortress walls to expose a 700-year conspiracy that secured their throne against invaders and traitors.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1297, François Grimaldi, disguised as a monk, infiltrated the Genoese fortress on Monaco's Rock and seized control, founding a dynasty that endures today
Monaco-Ville — Grimaldi Secrets
You are a Royal Archivist for the House of Grimaldi, in present-day Monaco-Ville, tasked with reconstructing the foundational history of your Principality.
Your mission begins at Place du Palais,
Dive into the heart of Monaco-Ville and uncover the secrets of the Grimaldi dynasty, guarded by the ancient stones of the Rock.
« With God's help »— Official motto of the Principality of Monaco
The story that haunts this land
Your quest begins at the Place du Palais, the starting point for visits to the historic district of Monaco-Ville. It was here that François Grimaldi, founder of the dynasty, captured the Genoese fortress on January 8, 1297. Every day at 11:55 AM, the changing of the guard perpetuates a centuries-old tradition. Around you, 17th-century historic buildings frame this square, approximately 0.5 ha, integrated into the pedestrian circuit. The Prince's Palace of Monaco, the official residence of the Grimaldi family since 1297, was initially a Genoese fortress built in 1191. These walls have seen 200 rooms and 7 floors evolve over the centuries.
Continuing towards the Cathedral of the Immaculate-Conception, you discover a major edifice of Monegasque heritage. Built between 1875 and 1903 in a Provençal Romanesque style, it stands on the site of a 13th-century church. Its 36-meter high facade houses an 1883 organ, restored in 2010. It is here, in the nave, that Princess Grace Kelly (since 1982) and Prince Rainier III (since 2005) rest, emblematic figures of the principality, highlighting the continuity of Grimaldi ceremonies since the 13th century.
The Saint-Martin Gardens offer a moment of respite and reflection on the history of Monaco-Ville. Created in 1820, they occupy the ramparts of Fort Saint-Martin, demolished in 1814 after the Napoleonic period. Over 1.2 ha, you admire busts of Monegasque personalities and a view of the Mediterranean Sea. 16th-century archaeological remains have been integrated into the pathways since 1997, and the site has been a public space since 1917, named after the 17th-century fort that preceded it. These gardens demonstrate the city's ability to reinvent itself while preserving its past.
Your journey then takes you to the Oceanographic Museum of Monaco, founded in 1910 by Prince Albert I, a renowned oceanographer. The building, constructed between 1906 and 1910 on an 85-meter high cliff, spans 110 meters in length. Its 6,000 m³ aquarium and 90 basins house exceptional marine biodiversity. Active as an oceanographic research laboratory since 1957 (ICSEM), it is located near a statue of François Grimaldi, recalling the link between the dynasty and exploration, albeit of a different nature.
The exploration of Fort Antoine concludes your immersion in Grimaldi history. This fort, built in 1701 to defend the port, was restored in 1960 and transformed into an open-air theater. Its 18th-century bastioned structure, measuring 50x30 m, still features period cannons. Since 1971, it has served as a stage for open-air performances, with a capacity of 300 seats. This historic monument is a remnant of the Grimaldi defenses against the Piedmontese invasions of 1707. By traversing this circuit of Monaco-Ville, you have deciphered the layers of history that forged the Rock and the Monegasque heritage.
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.
The game downloads to your phone on start. Once the "✓ Downloaded" indicator appears, everything works without data — narration, AR, GPS and puzzles. Perfect abroad without a data plan.
Want to go deeper?
Places tied to your adventure — optional entries, totally up to you · per person
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?
Secret Diplomacy
Uncover the mysteries of hidden treaties and alliances that shaped Monaco's independence.
Dynastic Legacy
Follow in the footsteps of the Grimaldi Princes, from the founders to the builders of the modern Principality.
Impregnable Fortress
Explore the Rock and its fortifications, witnesses to seven centuries of fierce defense.
The spirit of the Grimaldis, the survival of a state.
Between alliances and subterfuges, independence was forged.
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
Q01What's the difference with a regular indoor escape room?
Outdoor escape game format: no physical locks, no actor, no fixed time slot. You start when you want, progress through Monaco-Ville, The Rock with your phone, and the city itself is the set. More immersive on local history, more flexible in pace.
Q02What walking pace should we expect?
Easy stroll: between stops you walk 3 to 7 minutes. No tough climbs unless flagged on the product page. If you really want to push, you can jog between stops, but that's not the point.
Q03Is Monaco-Ville — Grimaldi Secrets good for a hen / stag party?
Great fit: no costume required, the team really collaborates (it's not a linear path), and the final code earns you a souvenir photo. Pick a calm time slot — early afternoon usually.
Q04Is Monaco-Ville — Grimaldi Secrets stroller-accessible?
Depends on the exact route in Monaco-Ville, The Rock. The vast majority of stops are downtown, on sidewalks or squares. If a stair or narrow passage is involved, it's flagged on the product page. Generally: yes, doable with a standard urban stroller.
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Your turn to play
Dive into the heart of Monaco-Ville and uncover the secrets of the Grimaldi dynasty, guarded by the ancient stones of the Rock.
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
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