Status
SteamPeaks
ChartsSalesUpcomingPatchesNewsCalculator
New on SteamEvery app, DLC and depot the minute Steam creates itAppsEvery app on Steam, newest change firstPackagesSubs and bundles, and what each containsDepotsDepots, manifests and install sizesTagsSteam's user tags and the games under themDevelopers & publishersCompanies and their cataloguesTechnologiesEngines, SDKs and anti-cheat found in the filesChange historyEvery PICS changelist as it lands
SignalsNineteen readings of the whole catalogueCompareAny games side by sideRecordsAll-time peaks and the days they were setReportsWeekly and monthly write-upsAlerts & newsroomWatch a game, get told when it movesSteam statusIs Steam up, right nowWeb API explorerTry the endpoints in the browser
NewsSteam's own announcements and the sales calendarCalculatorWhat a Steam account is worth, and its pile of shame
/
Sign in
/
SteamPeaks
The ultimate resource for Steam data.
ExploreChartsSalesSales and festsUpcomingPatchesNewsRecordsTrendingSignals
DatabaseAppsPackagesDepotsTagsDevelopersTechnologiesChange history
ToolsCalculatorCompareSearchAlertsSteam statusAPI
SiteMethodologyFAQDiscordSupportSign in via Steam
Not affiliated with Valve or Steam. Game names and artwork belong to their owners. All times UTC.
PrivacyCookiesFair useStatus
Plague Inc: EvolvedNewsAliens & Anti-Vaxxers DLC & Update 1.23 - Out Now!
Release

Aliens & Anti-Vaxxers DLC & Update 1.23 - Out Now!

Plague Inc: Evolved · published 7 Apr 2026, 12:08 UTC

All newsPlayers around this dateRead on Steam

Our newest DLC: Aliens and Anti-Vaxxers is available now! It brings a brand new special disease type and six scenarios with conspiracies, demons and hordes of zombies!

But that's not all! There's free Leprosy for everyone in the new 1.23 Update.

Xenolith: The Alien Crystal plague

From the infinite depths of space comes an utterly alien plague type. Radically new gameplay, mysterious victory conditions, interstellar genes, haunting music and much more. The world will never be the same again.

Xeno-form the Planet!

Penetrate the Earth’s crust and begin a geological process to convert everything into pure, alien crystal. If any native lifeforms get in the way - simply shatter them in an unstoppable resonance cascade.

Extinction Event!

Use gravitational anomalies to pull meteors out of orbit. Choose whether to focus on crystal geodes to spread infection, EMP bursts to disrupt human technology or even vast, continent killing asteroids from deep space!

Resistance is futile

Humans are utterly insignificant but they can still disrupt you if left alone. G-COM will intelligently deploy advanced technologies including disruptors, defensive satellites, cloud seeding, alien powered computers, artificial tsunamis and more. 

Six New Scenarios

Sometimes even an alien plague threatening the entire galaxy isn’t enough to get you out of bed. Well don’t worry - we have you covered with a whole host of major new scenarios that add new gameplay mechanics, mix up strategies and add new narratives. Read on for demons, herd immunity, endlessly marching zombies and more.

Anti-Vax

Faith in vaccines is collapsing. Global vaccination campaigns fight to hold the line, but weaponised conspiracies and viral misinformation are infecting the truth! What's the worst that could happen?

Hell on Earth

It's time to subjugate the world! Unleash a heat-loving, hell-spawned plague to corrupt people, animals and even the world itself. Satan is waiting in the depths...

Zombies vs. Earth

A melting glacier unleashes a forgotten nightmare. Greenland falls to the zombie hordes overnight! There is no virus, no cure, only the relentless march of the undead. Can they consume the world?

Check out the store page to read about Measles, Herd Immunity and Cure Mania!

Update 1.23 - Special bonus for everyone: Leprosy

Good news, everyone can have leprosy for free - even if they don’t have the new Aliens & Antivaxxers DLC. To experience it first hand, just update the game and it will be there waiting for you!

Leprosy

Leprosy still infects around 200,000 new people every year, but it's dying out. Can you overcome modern treatments, social stigma and long incubation periods to bring Leprosy back into the headlines?

Will A&A ever be given away for free?

Some of you may have got our first DLC Plague Inc: The Cure for free. That is because we gave it away for free during the COVID pandemic as we didn’t want to profit from a serious health situation.

If an alien invasion* happens - Ndemic will adopt the same approach and give A&A away for free for the duration of the invasion.


*Invasion is defined as an alien entity commencing a military offensive intended to establish control over any portion of Planet Earth…

Got more questions? Check out the FAQ here:

https://steamcommunity.com/app/246620/discussions/0/797839485450717782/

Update 1.23 Changelog

New Features & Content

  • Added Official Scenario: Leprosy (Free for all players)

  • Xenolith - New Special Plague Type (Requires Aliens & Anti-Vaxxers)

  • Added Official Scenarios: Anti-Vax, Hell On Earth, Zombies Vs Earth, Measles, Herd Immunity and Cure Mania (Requires Aliens & Anti-Vaxxers)

Bug Fixes

  • Fixed Nanovirus not being impacted by blue Cure Bubbles

  • Fixed Tutorial blocker when being asked to select a country

  • Fixed issue where players could not progress in Cure Mode tutorial

  • Fixed issue where playing on Casual would affect Speedrun scores 

More from Plague Inc: Evolved

Other announcements

All news
Game update10 Aug 2026Patch Notes 1.24.0.3Hi Folks, a small patch to address some reported issues. Thanks for your feedback! Changelog · Fixed an issue where the Peripheral Verge Outbreak would crash on startIn-game event3 Aug 2026World Update 2026 - Out Now!The world keeps changing! And Plague Inc. evolves with it in this new free update! The 2026 World Update uses the latest global data sets from the World Bank to upgrade the core Plague Inc. simulation model gamewide - including for the newly added Xenolith disease type . If you want to live in the past, then the free Plague Legacy scenario is available to everyone and puts things back to the wa…Game update21 Apr 2026Plague Inc: Evolved - Patch Notes 1.23.0.11Glad you're all enjoying the update and the new DLC! Thanks for all your reports and feedback! Bug Fixes General · Fixed issue with multiple translations having English language words present · Improved conditions for unlocking Cheats · Fixed an issue where news headlines from the last game would appear after starting a new game · Fixed issue where Zombies or other population types wouldn't app…