Gamla Stan — Stockholm's Black Ledger
Uncover the encrypted Black Ledger of wartime spies hidden in Gamla Stan's shadows. Decode clues at ancient monuments to expose traitors and seize the secrets before they vanish forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the dim alleys of Gamla Stan during World War II, neutral Sweden became a shadowy web of espionage
Gamla Stan — Stockholm's Black Ledger
You are a royal archivist at the Swedish court in 17th-century Stockholm, tasked with unearthing the darkest secrets buried beneath the cobblestones of Gamla Stan, a UNESCO World
Dive into the shadows of Stockholm, where nobility and kings forged Swedish history with plots and revolutions.
« CAROLVS XII REX SVECIAE MDCLXXXII-MDCCXVIII »— Inscription on the pedestal of the Statue of Charles XII, 1868
The story that haunts this land
Your quest begins at Kungsträdgården, a public garden established in 1450 as a royal orchard by King Magnus Eriksson, transformed into a public park in 1630. It is here, near the adjacent statue of Charles XII erected in 1868, that Viking archaeological remains were discovered in 1970, recalling Stockholm's deep origins. This site has also been the scene of historical demonstrations, such as the 1967 riot against the Vietnam War, gathering 10,000 people. The mystery of kings and conspiracies is rooted here, inviting you to decipher the first enigmas hidden in the details of this iconic square in the Swedish capital.
The statue of Charles XII, erected in 1868 by sculptor Johan Peter Molin, stands proudly, representing the King of Sweden (1682-1718) who died at the siege of Fredriksten in 1718. Standing 4.8 meters tall on a 6-meter pedestal, it bears the inscription 'CAROLVS XII REX SVECIAE MDCLXXXII-MDCCXVIII'. This historical monument in Stockholm has been moved several times for protection, notably in 1953 during construction work. As a royal archivist, you perceive the echoes of decisions that marked the kingdom, from court intrigues to bloody battles, thus weaving the thread of your investigation into Stockholm's heritage.
Your journey leads you to Riddarhuset, the palace of the Swedish nobility, built between 1641 and 1674 by architect Hans Heltne. Its 50-meter-long baroque facade is adorned with 538 coats of arms of noble families painted in the 17th century. This building served as the seat of the House of Nobility until 1866 and now houses the nobility's archives. The surroundings were the site of historical noble executions in the 17th century, revealing the dark side of power. Not far, the Sveriges Riksbank, founded in 1668 as the world's first central bank, saw its current building constructed in 1906 by Axel Anderberg, and recalls the financial scandals of the 17th century involving the nobility. This thematic circuit in Stockholm plunges you into the history of wealth and influence.
Continue to Tyska kyrkan (St. Gertrude's Church), a Gothic church built around 1618 on a site dating from the 13th century, dedicated to the German community. Its 67-meter tower, the tallest in Gamla Stan, features a carillon of 39 bells installed in 1911. Inside, tombs of Hanseatic merchants from the 17th century and a baroque altar from 1690 by Nicodemus Tessin the Younger bear witness to the dark commercial intrigues that have spanned the ages. Your quest then takes you to Stortorget, Gamla Stan's central square since the 13th century, where in 1520, the Stockholm Bloodbath saw 82 Swedish nobles beheaded on the orders of Christian II, a key event in Stockholm's history.
Finally, the path leads you to Norrbro, a bridge built between 1800 and 1815 by Erik Palmstedt, connecting Norrmalm to Helgeandsholmen. This neoclassical bridge, Stockholm's widest in the 19th century, offers a view of the Charles XII statue and has been used for royal processions since 1815. It symbolizes the link between the monarchical past and the city's present. Your exploration of Stockholm's heritage concludes with an understanding of the complex connections between places and events. This GPS scavenger hunt will have introduced you to Stockholm's monuments and history, revealing a unique interactive tour of the Swedish capital, beyond the beaten path.
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.
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. »
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 Route
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.
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 · 12€No calendar booking. Code sent immediately by email.
🔒 Secure payment · Code in 5 min · Free cancellation
Practical info
Why this route?
Espionage Investigation
Dive into the underground world of Swedish secret services and foreign agents.
Political Dilemmas
Explore the difficult choices of a neutral country caught between warring great powers.
Secret Trade Routes
Uncover the vital and controversial role of Swedish trade during World War II.
Truth awaits in the shadows.
Decipher the Black Ledger.
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
Dive into the shadows of Stockholm, where nobility and kings forged Swedish history with plots and revolutions.
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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