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Uncover Archduke Johann's hidden legacy: forgotten plans concealed in Graz's landmarks. Decipher clues across the Old Town to expose his visionary secret before it's lost forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the heart of 19th-century Graz, Archduke Johann, the 'People's Archduke,' dreamed of a radical transformation for his beloved Styria
You are a trusted imperial archivist from the Habsburg court, dispatched to Graz in the mid-19th century, on a secret mission to decipher 'Johann's Secret Legacy'.
Your quest begins on
Dive into the heart of Graz, Styria's capital, following the footsteps of Archduke Johann, an emblematic figure whose legacy shaped the city.
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 adventure begins on Graz's Hauptplatz, a vast 14,000 m² square surrounded by buildings from the 15th to 19th centuries. In the center, the Erzherzog-Johann-Brunnen (Archduke Johann Fountain), inaugurated in 1878, pays tribute to Archduke Johann of Habsburg (1782-1859), whose role was paramount for Styria. Facing you stands the City Hall (Rathaus), rebuilt between 1887 and 1893 in a Neo-Renaissance style, with its imposing 60-meter-wide facade, a testament to Graz's civil power, a City of Human Rights since 1999. It is here, in the heart of Graz's historic city center, a UNESCO World Heritage site since 1999, that the first clues of your historical treasure hunt await you.
Just 200 meters from Hauptplatz, on Herrengasse, the Landhaus reveals the splendor of the Renaissance. Built between 1557 and 1565, this palace now houses the regional government of Styria. Its facade is adorned with 225 sculpted busts of Styrian notables, a unique architectural feature in Central Europe. Its inner courtyard, with three-story arcades and dimensions of 45m x 35m, transports you to the 16th century. Nearby, the Joanneumsviertel, a museum complex created by Archduke Johann in 1811, invites you to explore the collection of over 3 million historical and scientific objects he assembled, showcasing the Archduke's passion for knowledge.
Continuing your urban journey in Graz, you take Sporgasse, a medieval cobbled street dating from the 12th-13th centuries. Four to five meters wide, it is lined with restored Renaissance and Baroque houses, with 15th-century commercial arcades. This pedestrian street, preserved since 1970, retains its intact historic layout and leads you towards Schlossberg hill. You then reach the Burgtor, a 16th-century fortified gate with 1.5-meter-thick walls, a necessary passage to access Schloss Graz, a former medieval fortress transformed into a princely residence in the 15th-16th centuries.
At the top of Schlossberg, the Uhrturm (Clock Tower), a 15th-century medieval watchtower, stands 28 meters high. A symbol of Graz, it offers panoramic views of the city and the Styria region. Its clock, dating from 1712, has the peculiarity of having inverted hands (the hour hand is longer than the minute hand). Four hundred meters southeast of Hauptplatz, Schloss Graz, now a regional museum, housed Archduke Ferdinand II (1529-1595) in the 16th century. He accumulated curiosities there, in the tradition of the great collectors of his time. It is here that you discover the 'Grazer Doppelwendeltreppe', a unique double spiral staircase dating from 1499, allowing people to ascend and descend without crossing paths.
Your exploration of Graz's Renaissance and Baroque heritage concludes by crossing the Erzherzog-Johann-Brücke (Archduke Johann Bridge). This 19th-century stone bridge, built between 1875 and 1877, spans the Mur River for 85 meters long and 12 meters wide. Adorned with sculptures dedicated to Archduke Johann, it offers a strategic viewpoint over the urban landscape. This historical treasure hunt will have led you through a preserved medieval quarter, offering an interactive visit to Graz and its protected historical monuments. You leave with an in-depth knowledge of Archduke Johann of Habsburg and the history of Styria, far beyond what a simple tourist visit could offer.
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
Discover the pioneering spirit of Archduke Johann, a fervent promoter of science and industrialization in Styria.
Unravel the mysteries of an audacious plan, hidden by the Archduke for the future of his beloved region.
Explore the historic streets and iconic viewpoints of Graz, in the heart of the Styria Johann so loved.
The future belongs to those who dare to dream it, and build it.
— Archduke Johann
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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Dive into the heart of Graz, Styria's capital, following the footsteps of Archduke Johann, an emblematic figure whose legacy shaped the city.
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.
12€. Explorez les collections d'histoire naturelle et d'ethnographie fondées par l'Archiduc Jean en 1811, avec plus de 3 millions d'objets.
8€. Visitez l'ancienne résidence princière et admirez la 'Grazer Doppelwendeltreppe', l'escalier à double hélice datant de 1499.
Gratuit à 5€. Goûtez ce produit emblématique de la Styrie dans l'un des marchés de Graz, comme le Bauernmarkt am Kaiser-Josef-Platz.
2,50€ (aller simple). Profitez d'une montée rapide et d'une vue imprenable sur Graz depuis le sommet de la colline.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.