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Uncover the hidden conspiracy behind the Porta Nigra's construction in Roman Trier. Decipher ancient clues across 8 landmarks to expose a traitor's plot that threatened Augusta Treverorum.[1][2]
📱 1 to 10 phones · 1 team per phone · Independent codes
In 170 AD, as Roman engineers erected the mighty Porta Nigra—the northern gateway to Augusta Treverorum—a shadowy conspiracy unfolded
You are Abbot Simeon, the 11th-century hermit monk who journeyed from Syracuse to settle in Trier.
Your mission: decipher the forgotten legends surrounding the Porta Nigra and its surroundings. Over
Step through the ancient arches of the Porta Nigra and unravel the mysteries of Augusta Treverorum, Roman Trier, with an augmented reality escape game.
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 quest begins in front of the Porta Nigra in Trier, this colossal Roman gate built around 180-200 AD as the northern entrance to Augusta Treverorum. A UNESCO World Heritage site since 1986, its 117 meters in length and 30 meters in height, crafted from grey sandstone, testify to Roman power. In the 11th century, Archbishop Poppo of Trier transformed it into a church, then a double church in the 12th century, before Napoleon restored it in 1804, giving it its name 'Black Gate'. Here, you unlock the first clues about the architectural transformations that have marked this historic monument of Rheinland-Pfalz.
Continue to the Hauptmarkt, Trier's historic central square since the Middle Ages, where weekly markets have been held since the 13th century. At its center, the Market Cross (Marktkreuz), erected in 958 by Archbishop Egbert, symbolizes the city's autonomy. The 1590 Pestilence-Brunnen fountain recalls the health challenges of the era. On this bustling square, surrounded by Renaissance gabled houses, you'll discover the influence of trade and religious congregations on the urban development of Trier, a city with a rich heritage.
A short walk away, the Dreikönigenhaus, built in 1230, stands as Germany's oldest patrician house. Its late Gothic facade, adorned with statues of the Three Kings, reaches 18 meters in height. Acquired by the city in 1925, it now houses the Trier City Museum. This monument, listed as a historic landmark, illustrates the prosperity of medieval merchants in Trier. The Simeonstift, a Benedictine monastery founded in 1028 by Abbot Simeon, adjacent to the Porta Nigra, with its abbey church built between 1030 and 1080, completes this medieval picture, housing Simeon's tomb, who died in 1035.
Your itinerary then leads you to the Römerbrücke, a Roman bridge built around 144-150 AD and still in use over the Moselle. 310 meters long with 13 preserved arches, it was a vital artery for river traffic until the 20th century. Its fortified tower, added in the Middle Ages, testifies to its strategic importance. About 1 km from the Porta Nigra, this bridge, restored in 1972, is one of Germany's oldest. Further on, the Barbarathermen, Roman public baths spanning 4 hectares with walls up to 13.5 meters high and a 70x30 meter natatio, illustrate Roman engineering and leisure of the era in Trier.
Finally, the Trierer Dom, St. Peter's Cathedral, Germany's oldest cathedral, whose original basilica dates back to 320 AD under Constantine, concludes your exploration. Its 112-meter main tower, completed in the 13th century, houses the Holy Tunic of Christ. Inscribed as a UNESCO World Heritage site in 1986, it is a pillar of Trier's UNESCO Roman Monuments. This circuit will have allowed you to relive millennia of history, from Roman emperors to medieval archbishops, and will have revealed the heritage of Rheinland-Pfalz, an unforgettable experience to discover Trier with family or friends.
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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Explore Trier's exceptional Roman remains, from the sandstone of the Porta Nigra to the foundations of the basilicas.
Decipher symbols and marks left by Roman builders, hidden in plain sight.
Relive the grandeur of Augusta Treverorum, one of the capitals of the Roman Empire.
The stone whispers ancient secrets.
Decipher the city's original plan.
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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Step through the ancient arches of the Porta Nigra and unravel the mysteries of Augusta Treverorum, Roman Trier, with an augmented reality escape game.
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.
5€. Visitez la maison natale de Karl Marx, transformée en musée, pour découvrir sa vie et son œuvre philosophique.
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20€. Profitez d'une vue panoramique sur les paysages viticoles et les châteaux depuis les eaux de la Moselle, au départ du port de Trèves.
12€. Explorez l'une des collections archéologiques les plus importantes d'Allemagne sur l'histoire romaine et médiévale de Trèves.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.