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In 1830s Zagreb, Ljudevit Gaj concealed his call for Croatian unity from Austrian spies. Decode his fragmented message across Grič's landmarks to reassemble the secret and ignite the Illyrian flame.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the shadowy alleys of 1830s Zagreb's Upper Town Grič, Ljudevit Gaj, the fiery leader of the Illyrian Movement, drafted his revolutionary 'Gaj's Call' – a manifesto igniting Croatian national awaken
You are a trusted intelligence operative for Ban Josip Jelačić, in Zagreb, 1866.
Your urgent mission: decipher coded messages left by Ljudevit Gaj, the
Delve into Zagreb's cobbled streets, where the echo of Croatian reformers still resonates beneath the millennial cathedral towers.
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
« Live rightly, act strongly, keep the faith »— Motto of the city of Zagreb
Your quest begins on Trg bana Josipa Jelačića, Zagreb's main square, named in honor of Josip Jelačić, governor of Croatia from 1848 to 1859. This 32,000 m² esplanade was the scene of gatherings for Croatian independence in 1990. From there, you head towards the majestic Zagrebačka katedrala, the Cathedral of the Assumption of the Blessed Virgin Mary and St. Stephen. Its Gothic construction began in 1094, but its neo-Gothic towers, soaring to 105 m, were only completed in 1880, the year an earthquake damaged it. It was also bombed in 1945. Here, you discover the tomb of Cardinal Alojzije Stepinac, archbishop persecuted under Tito.
Continuing your visit to Zagreb, you take Ulica Ljudevita Gaja, a street named after the Croatian linguistic reformer Ljudevit Gaj. In the 1830s-1840s, Gaj was a leader of the Illyrian movement, and in 1830, he published the first almanac in standardized Croatian alphabet. This street, located in the Gornji Grad - Medveščak district, connects Jelačić Square to the Grič area. You then arrive at Trg Josipa Jurja Strossmayera, where the Hrvatski sabor, the Croatian Parliament, stands. This neo-Renaissance building, constructed between 1904 and 1908 by architect Kosta Bajić, has been the seat of the Sabor since 1918 and was the site of the proclamation of Croatia's independence on June 25, 1991.
Your journey then takes you to Kamenita vrata, the Stone Gate, a remnant of Gradec's 16th-century fortifications. It is the only survivor of the five original gates, approximately 4 m wide and an emblem of the historic Gornji Grad district. A Baroque chapel was built there in 1760 after a fire in 1731 miraculously spared an icon of the Virgin. The exploration of Zagreb's historic center continues via Radićeva ulica, a typical cobbled street, about 300 m long, connecting Jelačić Square to the entrance of Tunel Grič. This street is named after Stjepan Radić, a Croatian peasant leader assassinated in 1928, and serves as a passage to Gornji Grad.
The Tunel Grič, a 350 m long pedestrian tunnel under Grič hill, dug in 1943 as an air-raid shelter during World War II, is a key stage of your thematic circuit. Opened to the public in 2016, it measures between 3.2 and 5.5 m wide and also served as a shelter during the Croatian War of Independence from 1991 to 1995. It is even known for having hosted one of Croatia's first raves in the 1990s. This site offers a unique perspective on Zagreb's history and resilience. Your stroll concludes at Matica hrvatska, the central cultural institution in Croatian intellectual life.
By exploring these Zagreb monuments, you have discovered the vibrant history of Gornji Grad - Medveščak, figures like Josip Jelačić and Ljudevit Gaj, and crucial events that shaped modern Croatia. This circuit has offered you an interactive visit, revealing Zagreb's historical heritage through the ages. You leave with a deep understanding of the struggles for independence and linguistic identity, from medieval fortifications to war shelters, a true exploration of Zagreb's historic center.
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?
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Reassemble fragments of a secret call for national unity, hidden by Ljudevit Gaj.
Evade the vigilance of the Austrian police, always on the lookout for signs of rebellion.
Dive into the heart of the Illyrian Movement and understand the emergence of modern Croatian identity.
Outwit imperial censorship and reveal the call for Croatian unity!
Zagreb, 1842. The fate of a nation is in your hands.
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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Delve into Zagreb's cobbled streets, where the echo of Croatian reformers still resonates beneath the millennial cathedral towers.
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
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7€. Un musée primé qui expose des objets personnels liés à des relations terminées, offrant une perspective unique sur les émotions humaines.
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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.