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Decipher coded bank records and expose a hidden Nazi gold laundering conspiracy buried in Zurich's medieval vaults during WWII. Uncover the truth before it vanishes.
📱 1 to 10 phones · 1 team per phone · Independent codes
Summer 1943
You are a Swiss archivist, commissioned in 1962, tasked with unraveling the 'Zürcher Goldaffäre,' a post-World War II gold trafficking affair.
Your mission leads
Delve into Zurich's alleyways, where whispers of a 1962 recycled Nazi gold affair still echo, following in the footsteps of bankers and reformers.
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
Your investigation begins at Bürkliplatz, a public square developed between 1880 and 1881 during the expansion of Zurich's lake quay. Named after State Councillor Ferdinand Wilhelm Burkli, this 12,000 m² area became a departure point for boats on Lake Zurich from 1882. It also served as a historical site for popular demonstrations, notably during the general strike of 1918, a prelude to the social and economic tensions that would mark the 20th century and set the stage for affairs like the gold scandal. Zurich's secrets begin here, beneath your feet, near the calm waters of the lake, where political and financial decisions often intersected.
Walking along Stadthausquai, you arrive in front of the City Hall (Stadthaus), a late Baroque edifice built between 1693 and 1698 by Hans Jakob Baur. Its facade, adorned with 13 allegorical statues 2.5 m high sculpted by Jeremias Bauschulte in 1698, represents the civic virtues that were meant to guide the Zurich cantonal government, which has been its seat since 1698. This building, with its 300 m² council chamber, embodies Zurich's stability and power, qualities that also allowed the city to become an international financial center, capable of managing complex, sometimes obscure, money flows, such as those you are investigating.
Your route then takes you to Bahnhofstrasse, a shopping street created between 1864 and 1867 after the medieval city moats were filled in. 600 m long, it is considered one of the most expensive streets in the world, with average rents reaching 15,000 CHF/m²/year in 2023. It was here, at the heart of this opulence, that the 'Zürcher Goldaffäre' erupted in 1962, revealing a post-World War II recycled Nazi gold trafficking. Bahnhofstrasse, though modern, testifies to the financial stakes that have shaped the history of Zurich and Switzerland, a Swiss Historical Monument ISOS and a Cultural Property of National Importance.
Ascending Rennweg, a medieval paved road dating from the 13th century and an integral part of the Altstadt's ramparts, you take a leap into Zurich's past. Formerly a horse racing street until the 17th century, 8 m wide and lined with Renaissance arcades, it houses 15th-century patrician houses, including the Haus zum Rüden built in 1530. This historic path reminds you that the city is not just a financial hub, but also a place of deep history, where Ulrich Zwingli, Protestant reformer (1484-1531), left his mark, and where figures like Hans Waldmann (1435-1489), mayor of Zurich, left their imprint.
Your investigation concludes near the Grossmünster, this Romanesque church founded around 1100 with its twin towers completed in 1220, soaring to 65 m. The seat of the Protestant Reformation in Zurich in 1523 under Ulrich Zwingli, and adorned with stained-glass windows by Sigmar Polke installed in 2009 over 120 m², it symbolizes the conscience and morality that have often guided, or sometimes been tested by, Zurich's history. This journey through Switzerland's Cultural Properties of National Importance will have allowed you to connect the facts of the 'Zürcher Goldaffäre' to Zurich's rich historical and architectural heritage, a city that has always managed to preserve its secrets while revealing itself to those who dare to seek.
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
Infiltrate a spy network and unmask double agents.
Explore the mechanisms of money laundering and Nazi gold.
Reconstruct a coded register to reveal explosive truths.
Neutrality can be a cover, but the truth always surfaces eventually.
Dismantle a money laundering network and expose dirty war money.
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.
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Delve into Zurich's alleyways, where whispers of a 1962 recycled Nazi gold affair still echo, following in the footsteps of bankers and reformers.
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

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Decipher a decades-old banking conspiracy buried in Zurich's medieval heart. Follow cryptic clues through hidden vaults, secret archives, and forgotten monuments to expose the truth behind Nazi gold and Swiss banking secrets.
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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
10-15 CHF. Explorez l'histoire et la culture suisses, de la préhistoire à nos jours, avec des expositions sur l'art, l'artisanat et l'archéologie.
20-25 CHF. Admirez une collection d'art couvrant du Moyen Âge à l'art contemporain, incluant des œuvres de Monet, Picasso et Chagall.
10-20 CHF. Profitez d'une perspective différente sur la ville de Zurich et ses paysages alpins environnants depuis les eaux du lac.
Prix variés. Dégustez des spécialités suisses traditionnelles dans une ancienne maison de guilde du XIVe siècle, avec vue sur la Limmat.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.