40 Days [四十天] — Steam capsule
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40 Days [四十天] Free Download

by Black Phoenix Studio

Windows · macOS · Nov 27, 2017

Download Now Data checked on Steam: Oct 20, 2026
Fit check

Is 40 Days [四十天] worth it for you?

We tell you who should skip it, too.

Play it if you…

Good fit
  • Strategy players who enjoy managing an outbreak rather than leading armies
  • Simulation players interested in quarantine decisions and virus research
  • Players who want a time-limited campaign involving public order and facility defense

Skip it if you…

Saves you a refund
  • Players seeking a long, open-ended campaign without a 40-day cure objective
  • Players who want combat to be the main activity rather than city, laboratory, and medicine management
  • Players looking for an empire-building or alien-invasion strategy game

Drafted from Steam store data with AI and reviewed by an editor · How we write fit checks · Report an error

Our take on 40 Days [四十天]

The defining structure is a race to find a cure within 40 days, combining disease research with quarantine authority, medicine pricing, public-order decisions, and defense against angry mobs.

What is 40 Days [四十天]?

This strategy simulation puts the player in charge of a quarantine department during an infectious disease outbreak across a city.

The main objective is to find a cure within 40 days. The player can examine citizens, send infected people to a laboratory, deploy air drops, and request reinforcements. Other responsibilities include researching the virus and its mutations, managing medicine prices, dealing with medicine merchants, suppressing a cult, and overseeing the city and laboratory. Random events and critical moments require decisions, while vigilantes and angry mobs threaten public order and facilities. The base can be upgraded, and attacks from angry mobs must be defended against during the campaign.

How 40 Days [四十天] plays

01Forty-Day Deadline
The cure must be found within a fixed period of 40 days.
02Citizen Examination
The quarantine department can examine citizens and send infected people to the laboratory.
03Virus Research
Research includes confronting virus mutations during the outbreak.
04City Administration
The player manages the city, laboratory, medicine prices, and base upgrades.
05Civil Unrest
Vigilantes and angry mobs create threats that can include attacks on facilities.

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Infectonator 3: Apocalypse

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Traditional Chinese Medicine Simulator

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Picked by overlapping fit notes and genres, not an editorial comparison.

40 Days [四十天]: platforms & release

Is 40 Days [四十天] worth it?

It is worth it if: strategy players who enjoy managing an outbreak rather than leading armies. Skip it if: players seeking a long, open-ended campaign without a 40-day cure objective.

Where can I download 40 Days [四十天]?

Use the Download Now button on this page: it opens 40 Days [四十天]'s store page, where you can choose how to get it.

What platforms is 40 Days [四十天] on?

Windows and macOS.

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