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Uncover the hidden Archives of Silence in Harbin's frozen streets. Decipher clues from Unit 731's atrocities, expose the buried secrets before they vanish forever.
📱 1 to 10 phones · 1 team per phone · Independent codes
In the icy shadows of 1930s Harbin, Japanese forces established Unit 731, a clandestine bioweapons lab where unspeakable experiments claimed thousands of lives
You are a clandestine investigator for the War Crimes Tribunal, autumn 1945, tasked with compiling evidence in the heart of Pingfang District, within the former puppet state of Manchukuo
Delve into the cryptic layers of history in Harbin, where the walls of the past whisper the darkest secrets of Unit 731.
Your quest begins in front of the Museum of Evidence of War Crimes by Unit 731, located in Pingfang District. This site, once the nerve center of operations from 1933 to 1945, is the starting point of your exploration. As an archivist, your first task is to grasp the scale of the complex, which was one of the Imperial Japanese Army's most secret. The very architecture of the place, with its remnants of 3-meter-high brick walls, gives you an insight into the efforts made to maintain secrecy around these facilities. Here, you will search for the first keys to unlock Harbin's archives of silence.
Continue your investigation by approaching the remains of the inner prison, a highly secured building whose cast-iron doors recall the isolation of its occupants. It was here, in May-June 1943, that a daring escape attempt took place. A prisoner managed to knock out a guard, freeing over 100 detainees into the inner courtyard. However, the fate of these souls was tragically sealed, all suffocating after chloropicrin gas was released. Your observation of the site will lead you to look for traces of this dramatic event, a poignant testimony to the conditions of the time in Manchukuo.
The route then takes you to examine the outer perimeter of the Unit 731 complex. Protected by a 3-meter-high brick wall and a dry ditch with electrified wire, this security system reveals the strategic importance and clandestine nature of the activities carried out here. As you move around these fortifications, you will collect clues about the logistics and surveillance methods used, crucial elements for understanding the isolation of this research center. The city of Harbin, and more broadly the Hokkaido region, bears the scars of this period.
Your exploration of the Unit 731 relics invites you to consider the global implications of this site. The work of Shiro Ishii, commander of Unit 731 from 1892 to 1959, is intrinsically linked to the history of this place. Although the site is not a traditional museum at every step, each remnant is a page of history. Through the ruins of laboratories and facilities, you perceive the extent of the research conducted there, a dark chapter for Heilongjiang province. Your mission as an archivist is to leave no stone unturned, from every brick, every piece of debris.
By the end of your journey in Harbin, you will have assembled fragments of a complex history, that of a secret research center that operated between 1933 and 1945. The evidence of Unit 731's crimes, inscribed in the landscape of Pingfang District, and the accounts of escape attempts, such as that in May-June 1943, will have allowed you to grasp a historical reality often obscured. This walking tour offers a unique perspective on Harbin's heritage and China's history, transforming a simple circuit into an immersive and memorable quest for truth.
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
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.
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Delve into the dark and little-known details of one of the most controversial chapters of World War II.
Follow a path marked by sites of memory and silent testimonies, paying homage to the victims.
Gather clues to unlock a private diary, a privileged witness to the horrors of Unit 731.
May silence never be a victory.
The truth, however painful, must be revealed.
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 the cryptic layers of history in Harbin, where the walls of the past whisper the darkest secrets of Unit 731.
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
More ideas for self-guided walking tours, scavenger hunts & city quests in the same city

Uncover the silenced voices of Unit 731 victims. Decipher clues hidden across forgotten sites to expose the atrocities and recover lost testimonies before they vanish forever.

Uncover the Forgotten Register of Unit 731, hidden amid the ruins. Decipher clues from labs, prisons, and incineration pits to expose the lost names of victims and unravel the darkest WWII biological conspiracy.

Uncover the broken oath of Unit 731's commander in Pingfang. Decode clues from ruins, labs, and prisons to expose the hidden archives of Japan's secret germ warfare atrocities before they vanish forever.
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Prix variable. Goûtez à la célèbre saucisse rouge de Harbin, une spécialité locale influencée par la cuisine russe.
💡 Réservation optionnelle — vous pouvez aussi acheter sur place. Tous les liens ouvrent dans une nouvelle fenêtre, votre visite OddballTrip reste préservée.