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Uncover the hidden conspiracy behind Rotterdam's 1940 Blitz. Decode survivor clues scattered across rebuilt landmarks to expose traitors who aided the Nazis and reclaim a lost resistance cache before it's gone forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
On May 14, 1940, Nazi bombers reduced Rotterdam's medieval heart to ashes, but whispers persist of a darker plot
You are a reconstruction architect commissioned in 1945 to document the remains of old Rotterdam.
Your mission: understand how this port city survived the total destruction of its historic center. At each stage
Walk through the scars of the May 14, 1940 bombing that razed Rotterdam, between surviving monuments and architectural rebirth.
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
« Strong as always, determined as ever »— Motto of the city of Rotterdam, adopted in 1945 after reconstruction
Rotterdam begins at the Stadhuis, built between 1914 and 1920 by Henri Evers in Dutch neo-Renaissance style. Its 70-meter tower, adorned with a sculpted dome, dominated Coolsingel when German bombs fell on May 14, 1940. Damaged but standing, the building today houses Isaac Israëls' frescoes painted between 1920 and 1922, witnesses to the pre-war port golden age. These walls tell the story of a municipality that refused the Nazi ultimatum and paid the heavy price.
The Grote of Sint-Laurenskerk, Gothic cathedral erected from 1449, becomes the symbol of Rotterdam resistance. The only major structure to survive the bombing, its 110 meters of length and 80-meter tower defy the flames. Inside rests Erasmus of Rotterdam, the prince of humanists who died in 1536, in a tomb sculpted by Conrad Meit in 1541. The Müller organs from 1734, with their 72 stops, still resonate despite war damage, restored in 1951 as a challenge to the silence imposed by occupiers.
Binnenrotte, the oldest market square mentioned since 1299, bears the scars of its tragic past. Center of medieval fairs since the 14th century, it was also the theater of public executions until the 18th century, notably that of 22 pirates in 1695. Its weekly flower market, established in 1870, was the largest in continental Europe until 1960. Today reconstructed, the square maintains its millennial commercial vocation, linking pre-1940 Rotterdam with the city that followed.
Facing Sint-Laurenskerk stands De Verwoeste Stad, Ossip Zadkine's bronze monument inaugurated May 15, 1954. This 6.5-meter screaming figure, cast in Paris and placed on a travertine base from ruins, embodies the pain of destruction. The biblical inscription from Jeremiah 4:20 still resonates: 'Destruction upon destruction is proclaimed.' Nearby, the 1898 Witte Huis, first Dutch skyscraper at 43 meters, miraculously survives. Sole survivor of the 25 towers in Kop van Zuid district, it was then the tallest building in Western Europe after the Eiffel Tower.
Your investigation ends at the Oude Haven quays, dug in 1350, Rotterdam's first maritime port. From here the Pilgrims embarked in 1620 on the Speedwell to America, leaving their mark at nearby Pelgrimsvaderkerk. The neo-Renaissance warehouses from the 1890s, listed in 1977, now neighbor Rotterdam Centraal station, inaugurated in 2014 with its 11,000 m² photovoltaic roof. You carry away Rotterdam's lesson: 'Sterk als vanouds, vastberaden als altijd' — a city that transforms every destruction into rebirth, every scar into new strength.
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.
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Discover Rotterdam's incredible transformation, from destruction to modern metropolis, through its architecture and monuments.
Follow the 'Brandgrens' and the visible and invisible scars of an event that shaped the city's identity.
Explore tales of survival, reconstruction, and the audacious spirit that allowed Rotterdam to rise from its ashes, stronger than ever.
Uncover the secret plan that saved Rotterdam's soul.
Decipher clues scattered throughout a reinvented city.
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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Walk through the scars of the May 14, 1940 bombing that razed Rotterdam, between surviving monuments and architectural rebirth.
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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Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.
25€. Collection d'art européen du Moyen Âge à nos jours, incluant Bosch, Bruegel et Van Gogh dans un bâtiment miroir futuriste.
3€. Visite d'une maison-cube inclinée à 45°, symbole de l'architecture expérimentale rotterdamoise des années 1980.
16€. Navigation de 75 minutes dans le plus grand port d'Europe, avec vue sur les terminaux pétroliers et les porte-conteneurs géants.
45€. Cuisine néerlandaise moderne dans une ancienne distillerie, spécialité de hareng fumé aux pommes de terre violettes.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.