Rammelsberg — The Black Ore Conspiracy
Uncover the conspiracy behind Rammelsberg's black ore that fueled imperial power. Decode hidden clues across Goslar's historic sites to expose the secret plot that nearly toppled the Holy Roman Empire.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the shadowy depths of Rammelsberg, a legendary knight named Ramm unearthed the black ore—precious galena rich in silver—that poured riches into the Holy Roman Empire for a millennium
Rammelsberg — The Black Ore Conspiracy
You are an investigative historian, arriving in early 19th-century Goslar, tasked with unraveling a conspiracy threatening the millennial secrets of the Rammelsberg mines.
Your mission
Delve into the heart of the Harz mountains, where the black ore of the Rammelsberg mines forged the destiny of emperors and kings of the Holy Roman Empire.
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 story that haunts this land
Your journey begins at the Rammelsberg Mines, an exceptional mining site where activity started in the 1st century and continued for over 1000 years, until 1988. This complex, now a UNESCO World Heritage site, is the oldest and longest-operating mine in the world, rich in copper, lead, and zinc. It was here that Johann Christoph Roeder designed his 200-year-old gallery and system of pipes and water wheels, which you will explore during underground guided tours. The wealth extracted from these depths made Goslar prosperous and attracted emperors and kings, establishing an inseparable link between the mine and the city's fortune.
Continue to the Kaiserpfalz Goslar, the Imperial Palace founded around 1040 by Emperor Henry III. This location was the political center of the Holy Roman Empire, hosting over 30 emperors between 1040 and 1250. The palace's splendor is directly linked to the mining opulence of Rammelsberg. Restored in the 19th century and converted into a museum in 1930, it still houses the preserved imperial hall. Along the way, you'll observe the Zwinger Gate, built in 1526, a testament to the fortifications that protected this imperial heart of Goslar.
The Marktkirche St. Cosmas und Damian, built between 1150 and 1230, is your next stop. This main parish church of Goslar, Romanesque in style with Gothic towers added in the 15th century, has overlooked the market square since the 12th century. Its interior, with its 1730 Baroque altar and historic organ, reflects the city's artistic and spiritual evolution. Nearby, the Brusttuch, an old 15th-century city gate, is part of the medieval ramparts that defended the city, highlighting Goslar's strategic importance, enriched by the mines.
Explore the Alte Münze, Goslar's former Mint, active from the 12th to the 19th century. This 16th-century building was essential to the imperial economy, transforming silver from the Rammelsberg mines into coins. Then, discover the Lohmühle, a 16th-century tanning mill. This edifice, using hydraulic power from the Harz water system, illustrates the artisanal ingenuity supported by Lower Saxony's mining wealth and the importance of water management in the Goslar region. These sites show you how raw wealth was transformed into economic and industrial power.
Your journey concludes by passing through the Breite Tor, a 28-meter-high city gate built in 1498, which was the main southern entrance to the fortified old town. This remnant of medieval defenses leads you to the Goslarer Museum, founded in 1878 in the former town hall. This municipal museum, with its collections of art and local history from the 13th to the 19th century, offers a synthesis of exhibitions on mining and imperial life. Your immersion in the history of Goslar, a UNESCO World Heritage historic city, will have allowed you to unravel the threads of this conspiracy, understanding how the Rammelsberg mines and the emperors shaped this exceptional city in the Harz Mountains.
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?
Mining Adventure
Explore the legacy of the Rammelsberg mines and the secrets of their millennium-long operation.
Imperial Intrigue
Unravel a plot related to the Holy Roman Empire's financing by Goslar's gold.
Mining Map
Reconstruct a hidden map that will lead to a forgotten Rammelsberg treasure.
Where the earth reveals itself, the Empire rises.
The miners of Rammelsberg
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
Delve into the heart of the Harz mountains, where the black ore of the Rammelsberg mines forged the destiny of emperors and kings of the Holy Roman Empire.
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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