The Royal Quarter — Unmasking Brussels' Secret Oath
Decipher the hidden symbols and forgotten oaths that shaped Brussels' power elite. Uncover the conspiracy between the Guilds and the Lodges that forged a nation's destiny.
📱 1 to 10 phones · 1 team per phone · Independent codes
Brussels, 1830
The Royal Quarter — Unmasking Brussels' Secret Oath
You are a clandestine patriot in Brussels, 1830.
Your mission: to unmask the secret oath that led to Belgium's independence, following a 1.5 km
Uncover the secrets of a revolution that forged Belgium, from the beating heart of Brussels' Grand-Place to the lodges of power.
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
« Unity makes strength »— Official motto of Belgium, adopted by law on April 23, 1831
The story that haunts this land
Your quest begins on the Grand-Place, a UNESCO Grand-Place 1998 site, built between 1695 and 1720 after the French bombardment. This ensemble of 40 listed buildings, covering 1.1 hectares, was the historic seat of craft guilds since the 13th century. It was here, in 1830, that Belgian independence was proclaimed, a pivotal event for Brussels' world heritage. The Gothic City Hall, completed in 1455, and its 96-meter tower housing 4 carillons of 45 bells since 1720, are the first witnesses to your Brussels-Centre treasure hunt, immersing you directly in the history of Brussels-Centre.
Continue to the Royal Theatre of La Monnaie, opened in 1819 on the former mint hotel from 1813. This historical monument Belgium, with its 50-meter wide neoclassical facade, is closely linked to the Belgian revolution. On August 25, 1830, the premiere of the opera "La Muette de Portici" sparked the riots leading to Belgium's independence. Burned down and rebuilt in 1856, it symbolizes the resilience of the classified Brussels-Capital Region. The theatre's name recalls the Royal Mint installed on the site as early as 1492, a key fact for understanding the origins of this Brussels-Centre visit.
Your itinerary then leads you to the Place des Martyrs, created in 1775 as Brussels' first public square. Surrounded by neoclassical buildings completed in 1822, it houses an underground cemetery where 11,000 martyrs of the September 1830 revolution rest. The Church of Notre-Dame-de-Fin-des-Temps, built between 1844 and 1847, and its crypt open to the public since 2015, honor these heroes. The central martyr, François Anneessens, beheaded in 1719 for rebellion against Philip V of Spain, is a key figure in this thematic circuit Brussels, linking past struggles to the nation's founding events.
The Parc de Bruxelles, landscaped from 1775 to 1783 on the gardens of the Coudenberg, offers a peaceful haven over 19 hectares. The current Royal Palace, built between 1827 and 1866 under Leopold I, has been its official residence since 1831. This place of royal strolls since the 18th century, crossed by 3 main alleys of 200 meters, is a must-see site for Brussels monuments. The Naiade Fountain, sculpted by Jacques Moeyaert in 1862, and statues of Belgian sovereigns installed from 1865, add to the historical richness of this Brussels exploration.
Your discovery concludes at the Mont des Arts, developed from 1956 to 1958 on the ruins of the Coudenberg palace demolished in 1771. This site offers a panoramic view of the Grand-Place from its 20-meter high platform. The Royal Library of Belgium, built in 1969, holds a collection of 5 million documents since 1837. The archaeological remains of the Coudenberg, exhibited since 2011, including the 1446 audience hall, offer a perspective on the history of Brussels-Centre. This final stage of your Brussels-Centre outdoor escape game allows you to contemplate the extent of Brussels' heritage and reflect on the oath you have unmasked.
The Route
5-10 curated sites across the territory
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 · 14,90€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Practical info
Why this route?
The Quest for the Secret Code
Unravel a mysterious code used by the founders of Belgium to forge the nation's independence.
Revolutionary Archives
Explore the iconic locations where the crucial decisions of the Belgian Revolution were made.
On the Footsteps of Liberals
Follow the path of influential figures, often from lodges, who shaped the country's destiny.
Liberty is not granted, it is conquered.
The True Secret of Freemasonry is the secret of Liberty.
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.
Avis des aventuriers
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Your turn to play
Uncover the secrets of a revolution that forged Belgium, from the beating heart of Brussels' Grand-Place to the lodges of power.
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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