The Book of Plagues

The Book of Plagues

DiaMMax Games · January 17, 2026 · Medical Sim, Outbreak Sim, Bullet Hell, Idler, Visual Novel

Buy the The Book of Plagues key for Steam from Kinguin at $0.35 — the cheapest of 2 stores we compare.

PC
Positive90% · 311playing now
Best price 80 Lowest tracked
$0.35-90%
⭐ lowest tracked
Kinguin Buy at Kinguin

Prices last checked

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Where to buy The Book of Plagues — official stores

Steam
Steam
Standard Edition · Steam
-90%
$0.69
$6.99
Buy

Cheapest The Book of Plagues keys — keyshops

Keyshops are third-party marketplaces — keys are resold and can be region-locked or a different edition. Check the listing's region & edition before buying.

Kinguin
Standard Edition · Steam
$0.35
Buy

The Book of Plagues price by region

The Book of Plagues costs $0.35 in the United States, $0.35 in Georgia (USD), £0.62 in the United Kingdom, €0.71 in Europe (EUR), CA$0.82 in Canada, A$0.97 in Australia, NZ$1.12 in New Zealand, R$2.67 in Brazil and zł2.97 in Poland right now.

Cheapest The Book of Plagues offer in each region, in local currency
RegionBest priceOfficial storeKey shopStores
United Statesyour region $0.35 −90% $0.69 $0.35 2
Georgia (USD) $0.35 −93% $4.69 $0.35 2
United Kingdom £0.62 −90% £0.62 — 1
Europe (EUR) €0.71 −90% €0.71 — 1
Canada CA$0.82 −90% CA$0.82 — 1
Australia A$0.97 −90% A$0.97 — 1
New Zealand NZ$1.12 −90% NZ$1.12 — 1
Brazil R$2.67 −90% R$2.67 — 1
Poland zł2.97 −80% zł2.97 — 1

Each row is a real price from that region's own stores, not a currency conversion, so the figures are not directly comparable. Switch regions in the header to shop the one you buy in.

Screenshots

About The Book of Plagues

✦ AI summary

The Book of Plagues puts you in the blood-stained shoes of a plague doctor navigating the moral nightmare of a dying medieval city, diagnosing diseases, crafting remedies, and making impossible choices that determine who lives and who burns. Navigate warring factions, decode medical mysteries through tense mini-games, and question your own sanity as your only confidant is a mocking raven whispering in your ear.

The city is drowning in Plague. Panic, hunger, and fear are tearing it apart. You are the last one who can change its fate: heal it, hold it back from collapse… or drive it to ruin with your own hands!

The Book of Plagues — game info

Platforms
Windows
Steam Deck
Playable
Player modes
Single-player
Controller
Full controller support
PC Game Pass
Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

✦ AI summary

Players praise the game's witty dialogue and humorous satirical take on medieval plague doctor life, along with its engaging Undertale-style minigame mechanics for curing patients and smooth Steam Deck performance. However, the primary concern is the use of AI-generated art that has been edited by an artist, which leaves players uncertain about what content is original and creates discomfort about supporting AI-heavy development; additionally, some find the writing uneven, occasionally cringey, and the overall RNG-driven narrative structure somewhat simplistic despite its charm.

Not recommended Apr 16, 2026
[quote][url=https://en.wikipedia.org/wiki/AI_slop][b]Warning: AI Slop[/b][/url] This game is partially or completely made with talentless, soulless AI generated content.[/quote] This is a somewhat genuine attempt to make a game with AI Slop. The game itself is portrayed as a "plague doctor" simulator, but really it plays like one of those RNG-run kingdom simulators/Oregon Trail... you're presented with random events and prompted with a multiple choice answer about what you'll do about it as a plague doctor in charge of deciding what people do when there's a plague. The writing is tongue in cheek and somewhat satirical, but like all VN heavy amateur games on Steam Direct, fairly bad and a little cringey. So basically you make RNG choices and see what the outcomes are and click through various "seasons" until the end. And just like Oregon Trail, this can result in everyone dying of a horrible, mistreated disease. From a technical perspective, the game doesn't meet basic minimum requirements that most PC gamers expect as standard. While there are options to change the resolution for the game, all this does is scale up the simplistic 2D art assets used to make the game, which …
19 found this helpful
Not recommended Jan 18, 2026
This game is a satirical joke of the era of medieval Europe and the black plague. It plays very much like King of the Castle where you basically go through each week with an "Edict" that controls how the story progresses followed by your "Patients". The story can change whether or not you choose to cure someone and cures follow a minigame progression similar to undertale. Medicine is available for use between each rounds and can be crafted and do different things such as healing, invulnerability, or curing parts of the plague. However the best part of the game has been the dialogue. The dialogue alone is hilarious. This game does state that generated AI art was used and expounded upon by an artist which is not great because that means theres no way to know what was original art and what is an amalgamation of stolen art and honestly the developer should clarify this. My own stance on AI is this is not okay however excluding that I did receive this for free however I do not know if I would buy this at the full price of 10$. I will need more playtime to see if it truly justifies that price but 10$ is not a bad entry price depending on if you can get a 5+ hours of playtime out …
17 found this helpful
Recommended Feb 23, 2026
Give me one sec to do this undertale mini game while I cure you bubonic plague. That really is the essence of the gameplay. You get patients that need to be cured of their ailments and you must complete various versions of the undertale battle game to cure them. It's pretty simple but fairly fun. I recommend this game if you want to prevent the black plague from happening again.
4 found this helpful
Recommended Feb 5, 2026
I was so excited to see this game is out now! Played the demo and fell in love with the gameplay, story, art style, and plenty of puzzles to cure your patients and keep you on your toes. Plus, this game runs beautifully on the steam deck with full controller support. Definitely will be dumping more hours into this plague-tastic maserpiece!
3 found this helpful
Recommended May 9, 2026
GREAT GAME!

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