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Plague Inc. – How to Beat Necroa Virus on Normal

The Necroa Virus in Plague Inc. is essentially a Zombie plague that acts completely different than any of the other plague types.

Certain Necroa abilities aren’t unlocked until you get to the Necroa symptoms. It also completely removes the Evolution Gene and replaces it with Necroa genes that have to be unlocked by beating the Necroa virus.

Gene Setup

DNA Gene – Cytochrome Surge (Get more DNA from popping orange DNA bubbles)
Travel Gene – Aquacyte (Increases the chance of your plague spreading by sea)
Necroa Gene – None
Mutation Gene – Creationist (Reduces the chance of mutation)
Environment Gene – Extremophile (Minor bonus in all environments – I like this one instead of the specific environment bonuses, but it’s not vital)

Necroa Strategy

This one took me a few tries to figure out, and unfortunately takes a bit of luck to beat. Here is the basic strategy that I used to beat it the first time.

Start in India, as it has a large population and access to both an Airport and Sea Port. It’s also a hot and humid country which will give you a boost to hot and humid environments, and you’ll only need to purchase cold type abilities.

Don’t purchase any Symtpoms until the end of the game when everyone on the planet is infected. If you have to devolve any mutations early in the game, you might as well start over because you may not have enough points at the end to finish properly since devolving is extremely expensive in in the Necroa plague type.

Start off with Blood 1 and Saliva 1 in Transmissions. Also purchase Drug Resistance 1 and Cold Resistance 1 on the Abilities page once you build points.

As you get more points, purchase Urogenital Expansion, Gastrointestinal Expansion, Air 1 and Air 2 for Transmissions. Also purchase Cold Resistance 2 for Abilities.

From here it’s a long waiting game. You’ll literally ride out this build until the entire planet is infected with your plague. Hopefully by the time everyone is infected you’ll have 60+ points banked up. If you’re a little short, then keep waiting a little longer to pop some of the orange DNA bubbles, or until you get a free Insomnia mutation.

Once the entire planet is infected, purchase the following symptoms: Insomnia, Fever, Photophobia, Delerium, and Cytopathic Reanimation. Once you purchase Cytopathic Reanimation, you’ll start the Zombie phase.

The rest of your purchases will be making your zombies stronger, reanimate easier, and be more effective killers. Start out with Autolytic Delay and Regenerative Activation in Abilities.

Soon the world should create a zombie task force called ZCOM, which will attempt to go out and kill your zombies. This is represented by black zombie bubbles that you can pop, which will your biggest resource for the end of the game.

The cure will start building slightly, but don’t fret over it too much because you’re zombies will be spreading like crazy.

Purchase these abilities when you have points: Putrefactive Resistance, Ambush Predation, and Regenerative Bio-synthesis

Purchase these symtpoms next: Anaerobic Resuscitation, Enhanced Motor Control

Some more abilities to speed up the process: Epidermal Digestion, Cranial Metastasis, Liquifactive Necrosis, Putrefactive Resistance, Liquifactive Resistance

And some final symptoms to finish everyone off and bump up your score a bit: Enhanced Sensory Integration, Peptide Surge, Psychosis, Cannibalism

Soon, the cure will essentially stop and the world will throw in the towel. Congrats on your first Necroa win!

How to beat the Necroa plague in Plague Inc. on Normal

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  1. Peter Barnes says

    This all seems to work fine for me, except for the cure. Once I get all of the symptoms and abilities you suggested after everyone gets infected, the world starts the cure and it literally takes like 1 minute to get to 100% and then everyone gets cured and then you lose.

    I’m using all of the genes above.

  2. Daniel Kelling says

    After reading this article I just happened to find the perfect 5-star strategy to win with just 16% cure in around 1500 days. It’s very similar to yours, but it starts slower while saving more points, and works faster once it starts. Here’s what I did:

    Start with the Creationist gene in your Necroa Virus, ’cause you must not have any symptom before the last human is infected. I also used the Xerophile gene just ’cause I had it available, but I don’t think it actually matters.

    Select India as your first country. There you’ll be able to infect most of the population very fast. First we’ll focus solely on Tranmission, so buy these as soon as possible:
    Saliva I
    Saliva II
    Blood I
    Air I
    Water I

    And then go for the Abilities:
    Cold I
    Medicine I
    Cold II

    Now you’ll play the waiting game. It should take some time to infect the whole world, and just hope you don’t evolve any symptom before that. When the last human is infected, you should have more than 75 DNA points in stock and it’s time for mayhem.

    Go for these Symptoms right away:
    Cytopathic Reanimation
    Anaerobic Resuscitation
    Enhanced Motor Control

    And the Ability:
    Autolytic Decay I

    From now on you’ll only worry about Symptoms. Buy these as soon as you have enough points:
    Peptide Surge
    Masticatory Tension
    Anabolic Boost
    Lumbrical Hypertrophy
    Adrenal Surge
    Acidic Reflux
    Enhanced Sensory Integration

    And done! Humanity won’t stand a chance even with the ZCOM.
    Here’s a photo with the results:

    • Stephen Crowe says

      I am trying out this method after the other one I tried out did not work entirely as it stated. I really do not like a game or section of a game, where you have to follow specific guidelines and only those work to complete a stage.

      • Stephen Crowe says

        Let me be more clear. Right so I followed this method

        Air 1
        water 1
        Saliva 1 and 2
        Cold resist 1 and 2
        drug 1

        K so I got about half or more of the population, and even with the creationism gene it still mutated, insomina. Whole and behold, a little more times passes and I haven’t infected everyone yet, and they find it.
        I hope I have enough time now until the whole world gets infected to let out zombie phase in fast pace action as these guides keep suggesting is easy peasy, (before they make a cure up?)

        Again I really do not like a game that only seems to allow you to beat each stage a very specific way, and then if some of these mutations still occur (completely out of your control, your screwed in even trying to win.
        Takes all the fun out of these stages, as I won’t even try to experiment and try to win.

        I don’t even care about winning as much as I would like to just try all the viruses out in different ways to try to win, (rather than having to win every single new stage in order to try out a new virus)

        • Stephen Crowe says

          Hello again.

          So I tried this strategy, because I still had a way to go before everyone was infected I felt after reaching 33% I had no choice but to use up my saved points for zombie making time.

          I got everyone in the end, but I had extra zombies waiting to take out the last country sweden, and was just allowed a few forays (which took forever to get enough points to do) that were quickly thrown out by sweden.
          I’m really pissed at how insanely hard this game is even on normal
          BTW I play the version from steam, and someone told me that the dev’s made the mac version much harder?
          Not sure about this.

  3. TheTram says

    Works but crazy long time waiting for all the dead to turn to zombies then die off. I ended up walking away for an hour or two to let it finish.

  4. says

    This was a great strategy but the problem was, the lethality isn’t good enough, iinstead of giving zombies abilities, upgrade to Acute Encephalatis (at the top of the symtoms chart) and the death rate will grow massively as well ast the zombie population

  5. Rinaldo says

    Greenland just doesn;t get infected ALL THE TIME. they really hate me. and when I wait longer the cure just wins the game.

  6. April Norman says

    I’ve been stuck on the Necroa Virus for 3 days or maybe longer! Hopefully this will help! Oh- and anyone who needs help our can give help, Please, go join the “Plague Inc Players- English Page” on Facebook! Help others players with tips or get to know one another! (Copy & paste the page name, search and Join!) ** Happy Gaming!

  7. SomeGuy says

    Insomnia just won’t stop mutating by itself, i had more than 50 points, and i devolved it till 0 points, this was just ridiculous

  8. lydia says

    This virus is a joke. I got insomnia mutated FOUR times before I got a single orange bubble (Which I had combined with the gene that increases points, only to give me 1 – 2 every pop). Don’t forget I was also using creationist which in itself is a complete joke. This is the least fun playthrough I have done through the entire main game. This is one instance where they need to just remove this content from the game.

  9. Max says

    that strategy worked like a charm. i didnt wait for the whole world to be infected though. once insomnia inevitably evolved i went with it. as long as you keep upgrading the lethality of your zombies, you only need the “reanimation” necroa ability to hit z-com harder. it worked amazingly well, compared to my attempted strategies.

  10. zorack says

    it may be a difference in version but yea creationist rarely EVER works the way you say it does. And once your gene does mutate it tends to mutate as if creationist isnt there so you get screwed…i suggest you redo your guide or at least attempt to replay the game before asking if people are using your gene selection…does not work on brutal or normal…

    • says

      Latest version, and Creationist still works fine for me. As I stated, it reduces the chance of mutation, doesn’t negate it. I find mutation one of the toughest battles in this plague type.

      It’s silly to assume that I haven’t played recently before suggesting to look over their gene selection. While this guide was written when Necroa first came out, a lot of it is still applicable. Creationist isn’t flawless, and the randomness of mutation will get you on this one sometimes.

      Simply stating “does not work” doesn’t help much honestly. This is a guide after all, for you to use to help develop your own strategies. That being said, I’m working on updating the guide, but Creationist is still at the core of the genes I use for this one.

  11. Nuajolbap says

    I tried with your tactic and couldn’t get it. When I finally infect everyone I don’t have enough DNA pounts to turn them Into zombies

  12. Andrew says

    It’s a really good strategy. But my problem is that once I get 3 billion infected it starts to mutate which gets really expensive and causes me to lose all my DNA before everybody is infected which ends up getting my spotted and cured. Any ideas?

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