Ragnar's Ransom — Decrypt the Viking Siege of 845
Decode the mystery of Ragnar's legendary siege: uncover how 7,000 pounds of silver vanished and why the Viking warlord truly spared Paris in 845.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 845, the Viking warlord Ragnar Lothbrok descended upon Paris with a fleet of drakkars, terrorizing the Seine and demanding an impossible ransom: 7,000 pounds of silver—enough to bankrupt the Franki
The Sack of Paris — 845, the ransom that shook the Empire
In 845, the Viking warlord Ragnar Lothbrok descended upon Paris with a fleet of drakkars, terrorizing the Seine and demanding an impossible ransom: 7,000 pounds of silver—enough to bankrupt the Frankish crown. King Charles the Bald paid, and Ragnar withdrew. But history whispers a darker truth: the treasure never reached Scandinavia. Monks at Notre-Dame recorded cryptic entries. Royal guards vanished. A princess made a secret pact. Now, walking the medieval heart of Île de la Cité—where the siege raged, where the cathedral stood witness, where the ransom was counted—you must decrypt the coded messages left behind by those who knew the truth. Was the silver hidden? Was Ragnar betrayed? Did the Church claim it? Your investigation begins at the very stones where Vikings once stormed ashore. Decipher the riddles, expose the conspiracy, and recover the lost legend of the ransom that changed France forever.
« Reginherus cum centum viginti navibus Sequanam intravit, et Parisios cepit ac vastavit »— Annales de Saint-Bertin, 845
The First Viking Pillage of Paris
In March 845, an impressive fleet of 120 Viking ships, led by a chief named Reginherus in Frankish chronicles, sailed up the Seine toward Paris. This historical figure would later be identified in Nordic sagas with the legendary Ragnar Lodbrok, the fearsome Viking king. The city of Paris, then concentrated mainly on Île de la Cité with some suburbs on the banks, had only weak fortifications and a pitiful garrison against this Nordic armada.
Faced with this unprecedented threat, King Charles the Bald, Charlemagne's grandson, chose negotiation over warfare. He paid the Vikings a colossal ransom of 7000 pounds of silver — a fortune representing several years of royal revenue. But according to chronicles, a mysterious dysentery epidemic struck the Viking camp after their attack on the Abbey of Saint-Germain-des-Prés. Ragnar, being superstitious, saw this as Saint Germain of Paris's revenge and ordered his troops' hasty departure, leaving many mysteries behind.
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
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?
Epic Battle
Relive the confrontation between 120 Viking ships and Paris's weak 9th-century garrison
Legendary Treasure
Discover where Ragnar Lodbrok hid the 7000 pounds of silver extorted from Charles the Bald
Divine Wrath
Solve the mystery of the epidemic that struck the Viking camp after the Saint-Germain-des-Prés attack
May Odin's ravens guide you to Reginherus's treasure
Viking gold still sleeps beneath the cobblestones of Lutetia
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
Uncover the secret of the first Viking raid on Paris and discover where Ragnar Lodbrok hid his fabulous treasure of 7000 pounds of silver. Between historical mystery and Nordic legends, sail up the Seine with the longships of 845 and solve the riddle of the epidemic that forced the Vikings to depart.
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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