Grič — Gaj's Hidden Call
From12€

🕒 No date to pick · Code valid 1 year · Play whenever you want

Get my code
💡City Pass from 19€All games in Zagreb
Upper Town Grič, Zagreb, CroatiaGrič — Gaj's Hidden Call
📍 Upper Town Grič, Zagreb, Croatia·🕐 2h30 – 3h·📍 ~2.8 km
Also available as:HistoricalMysterySpy thrillerRomance

Grič — Gaj's Hidden Call

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

Difficulty
·From age 12 years
Starting point :Ban Jelačić Square, in front of the equestrian statue.

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

8
stages
~2.8 km
route
2h30 – 3h
at your pace
🚶
walking

Grič — Gaj's Hidden Call

🎭Your Mission

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.

Far more than an escape game

A game, a guided tour and a heritage guide — all in one

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.

🏛️
Hidden historical gems

At each stop, places ordinary guides miss — secret façades, sculpted crests, alleys steeped in history.

📜
Anecdotes & legends

Every riddle is rooted in a real historical fact or local legend. You leave with dozens of stories to tell.

🏗️
Architecture & heritage

Learn to read buildings — flamboyant Gothic, Baroque, Art Deco — like a real art historian, while having fun.

🚶‍♀️
Immersive wandering

Walk through the city like a novel's character — every alley becomes a stage, every square a theatre.

🎙️
Immersive audio narration

A voice walks with you at every step, tells the story of each place, reads clues, adds a cinematic feel.

📲
Yours forever

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. »

How does it work?

🏛️
Outdoor escape game

Explore the city on foot solving puzzles based on real historical facts. No locked room — the city is your playground.

📱
On your smartphone

No app to download. Play directly from your browser. Guided step by step, at your own pace.

👨‍👩‍👧‍👦
Unlimited players

One purchase per phone is enough. Play with family, friends or as a couple — everyone participates.

🎯
Augmented reality

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.

🤖
AI that helps you

Stuck? Progressive personalised hints. The character repeats the puzzle on demand — at your own pace.

🗣️
32 languages

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

Museum of the City of Zagreboptional
€5. Explore Zagreb's history from prehistory to the present day, located near Gornji Grad.
Optionnel
/pers.
Museum of Broken Relationshipsoptional
€7. An award-winning museum exhibiting personal objects related to ended relationships, offering a unique perspective on human emotions.
Optionnel
/pers.
Štrukli tastingoptional
€10-15. Savor štrukli, a culinary specialty of Zagreb, sweet or savory, in a traditional downtown restaurant.
Optionnel
/pers.
Zagreb Funicular rideoptional
€0.66. Take the historic funicular connecting the lower town to Gornji Grad, the shortest public funicular in the world, for picturesque views.
Optionnel
/pers.
Budget if you do them all / pers.~0
« Live rightly, act strongly, keep the faith »
Motto of the city of Zagreb

The story that haunts this land

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.

1835
Ljudevit Gaj publishes the first issue of 'Danica ilirska', the flagship newspaper of the movement.
1842
Founding of Matica ilirska (today Matica hrvatska), a key institution for Croatian culture.
1848
Revolutions erupt in Europe. Ban Josip Jelačić is appointed, marking a turning point for Croatian autonomy.

The Route

8 stages through the city

The gameplay: AR, camera, hidden clues

📱Search clues with your cameraRA

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.

8
original puzzles
24
min of narration
🪙 24
TripCoins granted
16
GPS waypoints

How does it work with a group?

One phone = one team. Pick the number at checkout (1 to 10).

🧍
1 phone

Solo, or a group sharing the screen. One team, one code.

👥
2-3 phones

Family, couple, or 2-3 teams competing. Each phone has its own code and its own score.

👨‍👩‍👧‍👦
4 to 10 phones

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.
🕒No date to pick · Code valid 1 year · Play whenever you want

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

Practical info

Starting point
Ban Jelačić Square, in front of the equestrian statue.
Directions on Google Maps
🕐
Duration
2h30 – 3h
At your own pace
👥
Players
Unlimited
From age 12
📍
Distance
~2.8 km
Upper and Lower Town
Accessibility
Partial
Slopes and stairs in Upper Town
🌐
Languages
17 languages
Built-in translation

Why this route?

📜

Fragmented Manuscript

Reassemble fragments of a secret call for national unity, hidden by Ljudevit Gaj.

🕵️

Imperial Surveillance

Evade the vigilance of the Austrian police, always on the lookout for signs of rebellion.

🇭🇷

Found Identity

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.

★ Innovation 2026

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

Soyez le premier à partager votre expérience.

Did you play l appel de gaj? Check the email you received after your game to leave a verified review.

Your turn to play

Delve into Zagreb's cobbled streets, where the echo of Croatian reformers still resonates beneath the millennial cathedral towers.

12€
1 phone
23€
2 phones
33€
3 phones
42€
4 phones
50€
5 phones
56€
6 phones
62€
7 phones
68€
8 phones
74€
9 phones
80€
10 phones

1 purchase = 1 phone. Play several on the same device.

🕒No date to pick · Code valid 1 year · Play whenever you want
Get my code · 12€

No calendar booking. Code sent immediately by email.

🔒Secure payment · Code in 5 min · Free cancellation

🪙+24 TripCoins granted with your booking

Other escape games in Upper Town Grič, Zagreb, Croatia

See all games in Upper Town Grič, Zagreb, Croatia

More ideas for self-guided walking tours, scavenger hunts & city quests in the same city

Explore other cities in Croatie

🎟️Coupe-file

Réservez vos entrées maintenant

Coupe-file disponibles pour les sites payants de votre parcours. Gagnez du temps, vivez l'aventure pleinement.

💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.