
A World War II computer. An archive of lost books. A world-changing secret. Narrative deduction meets audio drama, from the creators of Overboard!, Heaven's Vault and A Highland Song.
Modeled estimate, not a reported figure. How we estimate →
Discounts
Every price cut of more than 20% we have observed, in each market that quoted one, with this game's chart position on either side of it. These are episodes, not a model: a sale is one event, and one event cannot tell you what the next one will do.
Reviews, worldwide (the counter carries no country): 1.43/day in the week to Aug 10 → 3.71/day in the week after.
For scale, across Steam · Top Sellers · Brazil over the last 30 days: the 24 chart moves that followed a price cut of more than 20% went a median of 9 places towards #1, and the 2,404 moves with no price cut behind them went 2 away. One store, one chart, one country — it is the only place we have enough observations to say even that.
Prices outside the United States have been collected since 6 August 2026 and chart positions since 19 July 2026, so a cut older than that has no market to compare and a market that joined later has no history yet. Nothing here is converted between currencies.
About
A voice is saying your name. A WWII-era machine, long hidden in a church basement, whirs to life. Through a crackling speaker, a man asks you to find a stolen book. He only knows the title. Time is running out.
The machine, created by Bletchley Park engineers Cecil Caulderly and Beatrice Dooler, contains a vast archive of obscure books, letters, and journals fed in over the span of fifty years in an attempt to crack the code of reality. As their lives fell apart, the machine kept working.
Navigate the computer’s archive. Link its obscure texts and uncover its creators’ secrets. Communicate with the man behind the speaker to figure out your role in this mystery. Destroy the book at the core of the machine — before it’s too late.
Deduce links through the archive to locate hidden sources.
Unravel the stories and unearth the secrets of the books’ authors and the machine's creators.
Map the archive and find the book that will rewrite the world.
Talk with your handler at any time, creating a dynamic audio drama that responds as you explore.
Featuring the voices of Rebekah McLoughlin (The SCP Archives, Eternal Threads), Paul Warren (A Highland Song, Viewfinder, The Séance of Blake Manor) and Phillipe Bosher (Baldur's Gate 3, Doctor Who, The Hitchhiker’s Guide to the Galaxy).
Original soundtrack by Laurence Chapman (A Highland Song, Heaven's Vault, The Mask of the Rose).
TR-49 takes inspiration from narrative deduction games like The Roottrees are Dead, The Return of the Obra Dinn, Type Help and Her Story, and from audio dramas like The Magnus Archives and ars PARADOXICA.
Written and created by the award-winning team behind Heaven's Vault, Overboard!, and A Highland Song.
Engagement
Reviews
Themes across 160 recent reviews and how positive each mention is. A keyword signal, not full sentiment analysis.
Reviews
用时5小时左右,长度适中。推理难度方面不难,线索提示还是比较直接的(规律很明显),最后两本卡了我半小时还是穷举拿下。具体玩法就是在数据库通过文件名找信息,找到的文件包含其他文件名的线索,然后顺藤摸瓜找到被各种隐藏起来的书。
Stunning game. Bizarre, but stunning. So incredibly up my alley as someone who enjoyed The Roottrees are Dead.
Best 9 hours I've ever spent playing anything
Media

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Genres
Stats
All-time low is the lowest price we've recorded for this game since we started tracking it.
Languages: English**languages with full audio support
Hours played at review time, across 160 reviews with recorded playtime.
positive critical· bar length = how often the theme comes up
A beautiful little mind-bender. I really need to stop finishing things like this in one sitting. Gems should be savored. If you liked Obra Dinn, pick it up. If you like mystery, good fiction, and reality manipulation, pick it up. Hell, if you like reading about old Bletchley Park exploits, pick it up.
Excellent puzzle game with an intruiging story and good voice acting.
Excellent narrative puzzle game! Perfect play time and requires deep reading and inference. I wish there was a notepad in the game somehow.
Not my thing. I admire the puzzle games but i just cant figure head to toe from this.
Excellent story and inspired voice acting. The writing itself is breathtaking and certainly an excellent puzzler if you enjoy putting together pieces, cross referencing and moving towards a resolution. 10/10 will play again.
Wonderful puzzle game with just the right amount of difficulty.
Cool Story
Players by region
Where this game's players are, estimated from review languages.
Players also reviewed
The games this title's players most often review too — audience affinity.
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