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Screenshots
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Watch trailer on Steam ↗40 Days [四十天]
Black Phoenix Studio · Published by Black Phoenix Studio · Official site ↗
Mixed — 54% positive (13 reviews) · 12 achievements
Last updated 27 Sept 2026
40 Days is a special strategy simulation game related to infectious diseases spread all over the city. You, as ahead of the quarantine department, have been given full authority and manpower to contain the city, deal with different parties, virus in the city and most importantly find out the cure.
DJCTQ 10
-70%
£1.19
£3.99Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
£1.19£3.99
Price history
3 Sept 2026Lowest: £1.19 · Highest: £1.1910 Oct 2026
Indie, Simulation, Strategy · 2017 · More under £5 games
As the head of the quarantine department in 40 Days, you must manage resources and navigate conflicts to contain an outbreak. This indie strategy game challenges your decision-making skills in a tense race against time.
About this game
40 Days is a special strategy simulation game related to infectious diseases spread all over the city. You, as ahead of quarantine department, have been given full authority and manpower to contain the city, deal with different parties, virus in the city and most importantly find out the cure.
Main Objective
Key Features
Main Objective
- Find the Cure within 40 days
- Choose wisely
Key Features
- Take action like Air Drop, Reinforcement. Examine Citizen, Send Infect to Lab and so on
- Virus research and face the virus mutant
- Maintain the medicine price
- Deal with medicine business man
- Depress the cult
- Manage your city
- Manage your lab
- Make decision during Critical Moment
- Make decision during random events
- Face the Vigilante
- Defend attack wave from Angry Mob
- Protect your facilities
- Upgrade your base
System Requirements
Will my PC run this? →Minimum
Minimum:
- OS *: Windows 7 or newer, 32-bit
- Processor: i3-2125
- Memory: 4 GB RAM
- Graphics: 2 GB VRAM
- DirectX: Version 10
- Storage: 500 MB available space
Supported Languages
English, Simplified Chinese, Traditional Chinese
Latest news
AnnouncementsOfficial
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v1.7 update
New Features - New Setting Features - Daily Cult action UI - Day and day count text will slightly separate Improvement - Replace Panel Option from Scene Option - Rewrite Assistant System - Force Player make the decision before got next turn - Fixed Assistant Message show wrong date problem - Improve DepressRead full article on Community Announcements (Lz)AnnouncementsOfficial
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v1.6 update
New Features - CULT will reduce MAX POWER - Add 6 New Virus Type - Autosave every day - Hard Mode will unlock all features in Day 1 Improvement - Show Warning Color when the total citizen is critical - Show Virus research when 100% on Logs - Show Lab unlock status on Logs - Update events content - Update random suggestion - Update and adjust Virus Research - Rewrite ACTION part in the backend, for future enhancement Fixed - Fixed Traditional Chinese not showing proper words in some part - Fixed Lab Help Panel not showing proper information - Fixed Healthy citizen some time will drop to negative - Fixed Search Talents not showing proper wordsRead full article on Community Announcements (Lz)
