Threat network
State of Decay 3 Plague Nests and Plague Hearts
New in State of Decay 3 · grown out of State of Decay 2's Plague Hearts
Plague Nests are the new enemy hubs at the centre of State of Decay 3's infestations. Each nest sits on a network of Plague Hearts and smaller infested sites, rolls a persona that decides how it spreads, and grows stronger as your community grows. It sends zombies toward your settlements whether you act or not, so ignoring one is a decision with consequences.
You can chip away at a nest by clearing the sites linked to it, or go straight for the core. Either way it only stays down for a while, and the reward for raiding it is some of the best loot in the game.
How the plague network fits together
Every piece of the infestation connects back to the nest. Select a node to see its role, what it does and what you gain by dealing with it.
Select a node in the diagram to read its record here.
Inside an infestation: orange biological growth lines a tunnel full of infected.
- Nest reward
- Some of the best loot in the game
- Plague Heart behaviour
- Calls reinforcements, including Juggernauts
- Blister node behaviour
- Pops and spews gas
Plague Nest
- Role
- Dungeon-like hub at the centre of an infestation network
- Behaviour
- Rolls a persona, grows over time and sends enemies toward your settlements whether you act or not.
- Payoff
- Some of the best loot in the game, because nests sit unlooted for so long.
Plague Heart
- Role
- Node on the network that leads to the nest
- Behaviour
- Calls reinforcements, including Juggernauts, when it comes under serious threat; destroyed hearts return over time.
- Payoff
- Clears zombies in a radius around it and frees neighbouring settlements to claim.
- Connected to
- Plague NestLinked infestation site
Linked infestation site
- Role
- Smaller infested site attached to a nest
- Behaviour
- Each one you clear weakens the central heart before the main assault.
- Payoff
- An easier final push and ground you can claim.
- Connected to
- Plague NestPlague HeartPlague War
Blister node
- Role
- Growth inside an infestation
- Behaviour
- Pops and spews gas when disturbed.
- Payoff
- Clearing it makes the infestation safer to move through.
- Connected to
- Plague Nest
Spitter
- Role
- Infestation element found alongside blister nodes
- Behaviour
- Part of the biological mass that defends the nest.
- Payoff
- One less hazard between you and the core of the nest.
- Connected to
- Plague Nest
Nest persona
- Role
- Behaviour set rolled for each nest
- Behaviour
- Some personas spread quickly toward you; others stay close to home and grow very tough to lure you in.
- Payoff
- Keeps nests from playing the same way from one save to the next.
- Connected to
- Plague Nest
Plague War
- Role
- The territory fight between your community and the plague
- Behaviour
- Infestations expand outward and can surround a settlement until the community has to relocate.
- Payoff
- Holding ground keeps your settlements and their resources safe.
- Connected to
- Linked infestation sitePlague Nest
Personas: why no two nests play alike
When a nest appears it rolls a persona, a behaviour set that changes both its form and how it grows. Two examples show the range: one persona pushes out fast and starts sending threats your way early, while another stays close to its own ground and becomes very tough, waiting for you to come to it. The first kind punishes slow, careful players; the second punishes anyone who lets it sit untouched for too long.
Personas are an extensible system, so new behaviour sets can be added over time without reworking the nests themselves. That fits the studio's plan to keep State of Decay 3 changing after release with community input, the way State of Decay 2 kept changing after its own launch.
In practice, scout a nest before you commit. A nest that is already spreading tells you to strike its linked sites now; a quiet one that keeps getting tougher is a raid to prepare for with your best survivors, a vehicle full of ammunition and explosives, and a plan for retreat.
Weakening a nest before the raid
A nest is never alone. Plague Hearts work as nodes on a network that leads to a central infestation four to six times bigger than a State of Decay 2 Plague Heart, and smaller infested sites hang off that network across the map. Clearing those less intense sites weakens the central heart, so the final assault is shorter and safer. You can also skip them and attack the nest directly if your group is strong enough.
A survivor holds a wrecked car against a horde closing in through orange smoke.
Expect resistance at every step. A heart under serious threat calls reinforcements, and those include Juggernauts, freaks that stand about ten feet tall. Even the lowest severity setting is intense for a group of three, so solo players should treat linked sites as essential, not optional.
Destroying a Plague Heart clears the zombies in a radius around it and frees the neighbouring settlements to claim, which is often the real reason to push into a cluster: it opens new ground for a second or third base.
Nests come back
Beating a nest does not end it. You can destroy a nest only for a while; it recovers and comes at you again whether you engage or not. Plague Hearts return over time as well. The plague is built to be a constant pressure on your community rather than a checklist of dungeons to clear once.
Nests also scale with you. As your community grows, so do they, which keeps the late game from turning into a victory lap. Treat each raid as buying time: the loot and the cleared ground are what you keep.
When infestations spread unchecked they start to surround settlements. This territory struggle is the Plague War, and at its worst it forces a community to pack up and relocate. A community squeezed out this way can start again elsewhere, as one did by moving into a new base called Green Heart after the infestations closed in on its first home.
Loot, risk and scavenging
Scavenging remains the backbone of State of Decay 3. Survivors still need food, water, ammunition and medicine, and the world has been picked over for years, so finished weapons are rarer than parts. Plague Nests break that pattern: because nobody has looted them, they hold some of the best items you can find. That makes them the high-risk, high-reward end of every supply run.
Pack for the danger as much as the reward. Fire is a strong tool inside an infestation, since Bloater bile ignites under a Molotov, and homemade explosives such as the grenade-rigged boom box can thin a crowd before you go in. Bring a vehicle with cargo space for the haul, because a cargo van carries far more than a sedan.
The world also rewards exploring with environmental storytelling, so a cleared linked site is worth a proper look around before you drive on to the next one.
Plague Nests vs State of Decay 2's Plague Hearts
Plague Hearts were State of Decay 2's infestation cores, and its Heart Attack update made them dynamic. Plague Nests are the next step of that idea. Instead of a single heart you destroy in one fight, a nest sits behind a network of hearts and linked sites, and the whole structure is several times larger than anything in the previous game.
Three changes matter most. Nests roll personas, so they behave differently from save to save. They grow alongside your community instead of staying at a fixed difficulty. And they push back, sending enemies toward your bases on their own schedule. A nest plays like a raid and suits a co-op group, but solo play remains a focus of the design.
Veterans of State of Decay 2's endgame can keep their habits: scout first, thin the outer growths, then commit with the strongest survivors. The difference is that the map now remembers between raids, so a nest left alone this week will be bigger and angrier the next time you drive past it.