Independence Hall — Unravel the 1776 Prophecy
Decode a cryptic prophecy hidden by the Founding Fathers in 1776, foretelling America's destiny. Follow their secret trail through Philadelphia's revolutionary heart to expose the final revelation before it's lost forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the sweltering summer of 1776, as delegates gathered in Philadelphia's State House—now Independence Hall—to forge the Declaration of Independence, a shadowy cabal among the Founding Fathers embedde
Dive into the heart of Philadelphia, the "City of Brotherly Love," to decipher the secrets that forged American independence in 1776.
Step into the shoes of Benjamin Franklin, printer, scientist, and signer of the Declaration of Independence, as you are tasked with reassembling fragments of a forgotten prophecy, hidden within Philadelphia's streets and buildings. Your mission takes you through a 1.5 km route, lasting approximately 135 minutes, where each step reveals a piece of the puzzle. Open your phone: golden letters appear on colonial brick facades, historical figures emerge in augmented reality to whisper clues, and virtual documents unfurl on ancient cobblestones. From Washington Square to the heart of Old City, you explore Pennsylvania's heritage that witnessed the birth of the United States. More than an outdoor escape game: an interactive tour immersed in over 200 years of history, with anecdotes revealed at each stop and confidential sites that classic guides overlook.
Les lieux que vous découvrirez
Les vrais lieux que vous explorerez au fil de l'aventure. Énigmes en réalité augmentée à chaque étape.
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
« We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. »— Thomas Jefferson, United States Declaration of Independence, July 4, 1776
The story that haunts this land
Your quest begins at Washington Square, established in 1682 by William Penn as one of Philadelphia's five public squares. Renamed in 1825 in honor of George Washington, it houses the Tomb of the Unknown Soldier of the American Revolution, dedicated in 1954. The Swann Memorial Fountain (1924) at its center, designed by Alexander Stirling Calder, represents Pennsylvania's three rivers and serves as the first clue for your 1776 prophecy, immediately immersing you in the atmosphere of the Historic District Old City.
Continuing your journey, you arrive at Carpenters' Hall, built between 1770 and 1773 by the Carpenters' Company of Philadelphia, the oldest trade guild in the United States. This Georgian-style building, measuring 40 meters long and 20 meters wide, hosted the First Continental Congress from September 5 to 26, 1775, a crucial prelude to the American Revolution. The walls of Carpenters' Hall still whisper the intense debates that shaped the first ideas of independence, guiding you to the next stage of your investigation.
Your path then leads you to Christ Church, founded in 1695. The current building, erected between 1727 and 1754, with its 67-meter steeple added in 1751-1754, was the second tallest in the colonies at the time. Figures like George Washington, Benjamin Franklin, and Betsy Ross worshipped there, and several signers of the Declaration of Independence are buried on its grounds. This site, listed on the National Register of Historic Places in 1966, is a pillar of Philadelphia's history, and a key element in deciphering the hidden messages of the era.
The Betsy Ross House, built around 1740, is your next stop. Betsy Ross lived there from 1773 to 1786, and tradition credits her with sewing the first American flag. This 4-story house, with its 5-meter wide brick facade, is typical of Philadelphia colonial architecture. Open for visits since 1937, it welcomes approximately 250,000 visitors annually. Immediately after, Elfreth's Alley, the oldest continuously inhabited street in the United States, established in 1702, offers its 32 colonial and federal style houses, red bricks and colorful doors that conceal further clues to the prophecy.
Your journey concludes at Arch Street Meeting House, the largest Quaker building in the world, constructed between 1804 and 1811. Founded in 1695 by William Penn, this Federal-style structure, 37 meters long and 24 meters wide, with a capacity for 3,000 people, saw Benjamin Franklin and Betsy Ross attend its meetings. It is here, in the heart of this Pennsylvania community, that the final pieces of the prophecy are revealed, allowing you to fully understand the spirit of the American Revolution 1776 and the legacy of the Founding Fathers who forever marked Philadelphia. You leave with a deep understanding of Independence Hall Philadelphia and the events that led to the UNESCO World Heritage Site 1979.
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?
Symbolic Prophecy
Unveil a prophetic message hidden in the city's details.
Founding Principles
Reconnect with the ideals that forged the new Republic.
Celestial Map
Interpret alignments and shapes as an earthly star map.
The stars guide the destiny of nations
Decode the prophecy for the Republic's future.
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
Dive into the heart of Philadelphia, the "City of Brotherly Love," to decipher the secrets that forged American independence in 1776.
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
Other escape games in Historic Center of Philadelphia
See all games in Historic Center of Philadelphia→More ideas for self-guided walking tours, scavenger hunts & city quests in the same city
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