Gather clues, collect treasures and unlock over 40 real-life locations in an authentic recreation of Tokyo spanning 1935 to 2025. Learn the history of the Imperial Capital through antique postcards, modern photos and cryptic clues that are randomized each time you play.
Inspired by the CD-ROM "multimedia experiences" of the 1990s like Encarta '96 and Cosmology of Kyoto, as well as modern detective games like The Roottrees are Dead and the Golden Idol series, Mysteries of Old Tokyo takes a set of postcards printed in 1930s Tokyo from the author's collection and brings them, hand-scanned, to your personal computer in full 1024x768 resolution.
Travel to over 40 real-life Tokyo locations, based on authentic antique postcards, while solving cryptic clues and chasing down treasure for Rare Items Acquisitions (Tokyo) Ltd. You'll learn something new every time you play.
Put your research skills to the test to assemble a database of Tokyo's most famous landmarks for your mysterious employers. Then, use that data to uncover inconsistencies and arrive at the truth.
Interact with a wacky cast of wandering spirits, from the flirty Kasuga-dono to the paranoid Nakamura-san, all with their own secrets to reveal - or not.
Brand new photography from 2025, aligned and matched with the original postcards, lets you see these postcards in a modern context. Plus, learn all about each location with the original 1930s postcard description (translated for the first time from Japanese) complemented by a present-day update covering the last 90 years of Japanese history.
As an agent for Rare Item Acquisitions, you'll come to know Tokyo like the back of your hand, while managing both time and money on your quest for the treasure. Your expense account is not bottomless!
As you play, unlock new locations to visit, together with a set of stunning low-poly 3D-rendered artifacts which you can browse at your leisure in the 3D Viewer.
Features
Solve cryptic clues in 1930s Tokyo with a lively cast of characters and a host of real-world locations.
Manage time and money as you acquire priceless artifacts for your employer, Rare Items Acquisitions (Tokyo) Ltd.
Track down 10 delightful low-poly 3D treasures and unlock over 40 authentic antique postcards as you play.
Step through over 90 years of history with matched and aligned photos from 2025.
Learn as you play with the original postcard descriptions translated from Japanese and brand-new updates covering the full history of each location.
Hello, detectives!
Demo 2.0 released with all-new gameplay, locations and puzzles
After the rush of October and the first demo, I\'ve been hard at work overhauling the gameplay and implementing feedback. I\'m really excited for you to play this new version and I look forward to hearing your thoughts.
https://store.steampowered.com/app/3929680/Mysteries_of_Old_Tokyo_Demo/\" style=\"pill\"" style="color:#bb86fc;text-decoration:none;">Try the demo!
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45655545/c2e645f213b04b23e6b5ccc510f8b4e95bcda22d.jpg\"][/img]
The biggest change in this demo is an all-new gameplay loop. Instead of being stuck in your office filling in data, you now get to go out and collect information yourself! You\'ll have to visit each location, take a photograph, and collect evidence to bring back to the office.
The all-new location list now includes:
Ginza Street, the most representative shopping street
[/*]Kabuki-za Theater, Kobikicho, Kyobashi
[/*]Hibiya Park
[/*]The Takarazuka Theatre
[/*]Senso-ji Temple dedicated to a Goddess of Mercy, Asakusa
[/*]Kameido Tenjin Shrine
[/*]
At the same time, as you explore these new locations, you\'ll encounter familiar spirits and get the opportunity to uncover their stories - if you like. The spirit report is now optional, so feel free to skip it if you want to see more locations.
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45655545/bc441b136c7309e56007c49a38c5f49cba661b67.jpg\"][/img]
There\'s also visual and audio changes. There\'s a new CRT Filter which can be toggled using the side menu. Plus, you can sink your ears into a Tokyo soundscape with new ambient audio based on real recordings.
This demo is almost completely different with new puzzles and locations, so if you enjoyed the first demo, I think you\'ll love the new stuff in 2.0.
Please note: Because of the new gameplay, if you have a saved game from the old demo, it unfortunately will not be carried over. Additionally, there are important changes in the tutorial for the new gameplay. However, unlocked achievements will remain.
[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/45655545/a6296b30051e699ac02c6f986afc3b5080d24e26.jpg\"][/img]
Steam Detective Fest
[img src=\"https://shared.fastly.steamstatic.com/store_item_assets/optin/sale_detective_2026/0/26cf30de508e4a95a047933d7aff9880883fca4f.jpg\"][/img]
Keep an eye out for Mysteries of Old Tokyo in the upcoming Steam Detective Fest! I\'m really pleased to have been included since I love detective games of all kinds. A few of my favourites (and inspirations for Mysteries of Old Tokyo):
Return of the Obra Dinn
[/*]The Roottrees Are Dead
[/*]The Golden Idol series
[/*]The Ace Attorney series
[/*]Chants of Sennaar
[/*]Hypnospace Outlaw
[/*]Paradise Killer
[/*]Analogue: A Hate Story
[/*]Outer Wilds
[/*]The Forgotten City
[/*]Her Story
[/*]
I wholeheartedly recommend all these games if you like smart detective puzzlers.
Demo 2.0 changes
Features:
Gameplay 2.0: The data entry stage and spirit report stage have been merged into one cohesive stage per week.
[list]Rather than having images and texts given to you, you have to visit each location to take a photo.
[/*]Visiting a location will unlock new evidence which is passed through to the Data Entry mode, with a counter to keep track.
[/*]Spirits now appear in more places, with more of a hunt to find them.
[/*]You can complete the Data Entry puzzles and Spirit Report stages for each week in any order.
[/*]The Spirit Report is now optional - you can skip it after completing Data Entry, but youll miss out on building relationships with the spirits.
[/*]
Ambient audio when visiting locations and stations.
[/*]CRT Filter for groovy visual effects.
[/*]PDA now has a route finder app to make it easier to get around.
[/*]New interlude scene for Week 2.
[/*]Reworked maps, plus a new location (Tama River).
[/*]File filter is now included on Spirit Report when selecting text file evidence, to make it easier to find relevant files for the contradiction.
[/*]Better controls on the postcard browser.
[/*]Making an accusation now requires confirmation.
[/*]New postcards for a week are shown in a different colour.
[/*]Bug fixes:
Route finding is improved and will give more concise, easy-to-follow routes now.
[/*]Improved map out-of-bounds behaviour.
[/*]Fixed position of Mitsukoshi Dept. Store.
[/*]Fixed slow night and strange behaviour around the hotel.
[/*]Desk date advances correctly per week.
[/*]Fixed text filter matching BBCode tags (e.g. tab would match \\
\\
).[/*]
Other:
Chapters 1 and 2 have been completely overhauled with a new selection of postcards and re-scanned images.
[/*]Database has been optimised and streamlined
[/*]
Minimum Setup
- Memory: 4 GB RAM
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