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Plague Tree (Vorona Cirus Treesease)

developed by Vorona gamedev
rated 3.7 stars, 70 ratings
rated 3.7 stars, 70 ratings

Posted June 8, 2023. Updated October 21, 2023. Has been played for 19531 hours.


The game's goal is to reach as many cases of the COVID-19 disease as possible. As you go down layers, you unlock things that greatly improve virus spread and strength, way beyond what the real virus could possibly accomplish.

latest update

Plague Tree (Vorona Cirus Treesease) v0.6.23 October 21, 2023

  • Added Deadly Mutations
  • Added 5 UnBoosted Virus upgrades
  • Added 7 UnBoosted Virus milestones
  • Added a Booster upgrade
  • Added an Unvaxxed Layer upgrade
  • Added 5 Anti-Distancing upgrades
  • Added 5 Achievements
view all updates

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newest comments

CaptPlasma November 17, 2023
+1comment score: 1

this games cursed lol got sick when i started playing it

skinnyBoi2015 November 16, 2023
+1comment score: 1

currently stuck at 22 infectors and ee163000 cases. can anyone help?

milonti November 15, 2023
+1comment score: 1

I like the concept and theme... but it feels like there's not really any choices to be made, everything is super straightforward. And it lags a lot when I turn on the autobuyer for replicators if I haven't gotten the milestone to prevent them from resetting things.

Aeronic November 13, 2023
+1comment score: 1

"Invalid value found in player, named 'severity'. Please let the creator of this mod know! You can refresh the page, and you will be un-NaNed."

got this error after my first fatality point and while redoing severity

bdh2022 October 31, 2023
0comment score: 0

This game was fun, but it gets boring at CTNA, and @Feesh01 'ZERO' Deaths achievement can only be cleared when entered Casualty Challenge 1.

top comments

Leshatasher123 June 9, 2023
+23comment score: 23

Not optimised. At all.

crust_cheese June 29, 2023
+10comment score: 10

As others have pointed out, this game just completely turns on its head once you unlock Fatality. It becomes very slow and essentially revolves around getting different buyables across multiple tabs. That's a shame, as the game up to that is quite fun and engaging.

lingluo June 26, 2023
+7comment score: 7

@unpogged you can hold shift to bulk attempt mutate. It's important but the game doesn't make it clear.

Piterpicher mod June 16, 2023
+6comment score: 6

The game's really fun, but also frustrating. Thankfully, the game's exaggerated nature prevents it from feeling grim. You can read my full review at

Acod June 8, 2023
+6comment score: 6

definitely one of the prestige tree mods

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