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Decipher the hidden truth behind the 1979 nuclear meltdown. Track down suppressed evidence, operator logs, and eyewitness accounts to expose what authorities concealed.
📱 1 to 10 phones · 1 team per phone · Independent codes
March 28, 1979: A valve jammed
You are an investigative journalist, fresh off the train in Harrisburg, March 1979, determined to uncover the truth behind the Three Mile Island incident.
Your mission: interview witnesses, analyze documents
Uncover the hidden truth of Three Mile Island and explore the corners of Harrisburg, Pennsylvania, to solve a mystery that marked American nuclear history.
Your investigation begins at the Pennsylvania State Capitol, a building that served as the nerve center for political decisions and official press releases for the State of Pennsylvania during the Three Mile Island crisis in March 1979. It was here that successive governors addressed citizens' concerns and managed communications surrounding the incident. As a journalist, you will search for traces of initial statements, press conferences, and government documents that attempted to reassure or inform the Harrisburg public about the actual situation at the nuclear power plant.
Continue to the State Museum of Pennsylvania, a place where the collective memory of Pennsylvania is preserved. Although not directly related to the 1979 incident, the museum offers insight into the historical and industrial context of the region, including exhibits on energy and technology that preceded the nuclear era. Here you will find information on Harrisburg's economic and social development that may have influenced public perception of technological risks, a key element in understanding reactions to the Three Mile Island incident.
Riverfront Park, along the Susquehanna River, offers a vantage point over the city and its surroundings. It was a place where Harrisburg residents came to relax, but also a gathering point where rumors and anxieties spread during times of crisis. You will visualize the distances and landscapes separating the city from the Three Mile Island plant, located about fifteen kilometers away. This park helps to grasp the scale of the event and its potential impact on the daily lives of citizens, heightening the tension of your investigation.
Your journey then takes you to the Dauphin County Courthouse. This building was the scene of many deliberations and perhaps complaints related to the consequences of the incident. In 1979, justice played a role in managing the repercussions, from investigations to potential compensation claims. You will search for judicial archives or testimonies that could reveal lesser-known aspects of the case, dissenting voices, or expert reports that did not make headlines at the time, all essential for your report.
Finally, your investigation concludes near Grace United Methodist Church, a place that, like many community institutions in Harrisburg, served as a spiritual and social refuge during the crisis. Fear and uncertainty drove many residents to seek comfort and reliable information. This journey will have allowed you to grasp the magnitude of the Three Mile Island event not only through technical facts but also through its human and social impact on the population of Pennsylvania, giving you a complete perspective for your final report.
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
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.
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?
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Dive into the heart of an accident that marked the history of energy and safety.
The fate of thousands of lives depended on the speed of the teams' deductions and decisions.
Uncover the voices of operators and officials facing the unknown, and the public's reactions.
Caution is the parent of safety.
Lessons from the past illuminate paths to the future.
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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Uncover the hidden truth of Three Mile Island and explore the corners of Harrisburg, Pennsylvania, to solve a mystery that marked American nuclear history.
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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💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.