Delft — The Assassin's Complot
Uncover the deadly plot to assassinate William of Orange. Decode clues hidden in Delft's landmarks to expose Balthasar Gérard’s secret network and prevent history's darkest conspiracy from repeating.
📱 1 to 10 phones · 1 team per phone · Independent codes
In 1584, the quiet canals of Delft erupted in chaos when Balthasar Gérard, a fanatical assassin dispatched by Spanish agents, murdered William of Orange, the Father of the Netherlands, in his own home
Delft — The Assassin's Complot
You are a principal archivist for Prince William of Orange, tasked with uncovering a conspiracy in Delft, 1584.
Your mission begins near the Oostpoort, the only surviving
Immerse yourself in 1584 Delft, at the heart of the Dutch Revolt, to thwart the plot threatening William of Orange, father of the nation.
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 story that haunts this land
Your investigation begins on the Oude Delft, in the shadow of the Oostpoort, this city gate dating from 1400, the only survivor of Delft's seven medieval gates. It served as a crucial guard post during the Revolt against the Spanish from 1572 to 1648, and its 15-meter-high tower, with its original drawbridge, reminds you of the tensions of the era. From there, you approach the Oude Kerk, built in 1240, whose 13.4-meter leaning tower testifies to unstable ground. This place of worship was used from 1572 during the Dutch Revolt, housing the tomb of Pierre de La Court, a merchant linked to the movement.
Continue your visit to Delft towards the Markt, the central square since the 13th century, where the weekly market has been held since 1285. This 5,000 m² square, surrounded by 17th-century facades, was a place of significant public executions, notably that of Balthasar Gérard in 1584. In the center, the 1695 fountain, funded by the Dutch East India Company, casts an ironic light on past conflicts. It is here, in front of the Stadhuis van Delft, that the first tensions of the plot are revealed, with whispers about William the Silent's intentions.
The Stadhuis van Delft, built in 1620 by Hendrick de Keyser in Dutch Baroque style, is your next stop. Its facade, adorned with 25 statues of Counts of Holland, including William the Silent, dominates the square. The 96-meter tower, equipped with a carillon since 1661, rang the city's bells when William was assassinated in 1584, when the building was the seat of municipal government. It is in its archives that you hope to find clues about the conspirators, in connection with the candidate UNESCO heritage of Rotterdam-Zuid-Holland.
Your quest then leads you to the Museum Prinsenhof Delft, a major historical site in the Netherlands. A former St. Agnes convent built from 1395, it was converted into William of Orange's residence in 1572. It is the exact location of the prince's assassination by Balthasar Gérard on July 10, 1584, and you can see the two bullet holes in the wall. After his torture in August 1584, Balthasar Gérard's tomb was displayed there, marking this museum as a crucial 1584 Dutch Revolt site. The 2,500 m² exhibition halls hold the secrets of the plot.
As you head towards the Nieuwe Kerk, built between 1383 and 1510, you understand the magnitude of the tragedy. Its 108.7-meter tower, the tallest in the Netherlands, has housed the tomb of William of Orange and the Orange-Nassau royal family since 1584. The 16th-century stained-glass windows commemorate the Dutch Revolt, and royal funeral services are still held there. This thematic circuit in Delft, this interactive city tour, will not only have introduced you to the Zuid-Holland heritage, but also to the deep ramifications of Delft's and the Netherlands' history, a true historical monument that shaped the nation.
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?
Historical investigation
Follow the clues of the Spanish plot that led to William of Orange's assassination.
Delft Heritage
Explore key sites of the Dutch Revolt and the Prince's life.
Political mystery
Decipher the motives and agents behind the assassin and his masterminds.
The shadow of Spain hangs over Delft.
Will you unmask the other conspirators?
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.
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Your turn to play
Immerse yourself in 1584 Delft, at the heart of the Dutch Revolt, to thwart the plot threatening William of Orange, father of the nation.
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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