Plague Inc.: How to Infect Greenland and Prevent Port Closures

To infect Greenland reliably in Plague Inc., keep your disease severity and lethality near zero until the island is infected, establish an outbreak in Norway, and evolve both Water transmission and Cold Resistance.

Greenland's reputation as a run-ending bottleneck comes from strict game mechanics rather than bad luck. The territory has roughly 56,000 citizens, an arctic climate, zero commercial airports, and no land borders. Its single seaport connects exclusively to Norway. When global disease severity rises, Greenland shuts down its docks faster than other countries because it only has one entry point to monitor. If Norway closes its port or Greenland locks down before an infected vessel arrives, standard transmission becomes impossible.

Norway and Maritime Port Mechanics

In Plague Inc., ships do not cross the ocean to Greenland at random. Greenland’s docks receive traffic exclusively from Norway. Securing entry requires managing conditions in both territories.

When Norway’s local infection count increases under low-severity conditions, ships departing its port will eventually transport the disease to Greenland. If you evolve early symptoms like Coughing, Rash, or Sweating too soon, global severity increases. This alerts health authorities, prompting Norway and Greenland to isolate their harbors before an infected ship docks.

Recommended Evolution Path for Standard Plagues

For standard pathogens like Bacteria, Virus, Parasite, and Prion, prioritize environmental survival and maritime spread while actively suppressing severity.

1. Water 1 and Water 2: These upgrades allow your disease to survive longer on ocean vessels, increasing the frequency of maritime transmissions.
2. Cold Resistance 1 and 2: Norway and Greenland are cold climates. Cold Resistance 1 speeds up transmission across Scandinavia, while Cold Resistance 2 is necessary for the pathogen to spread efficiently once it arrives on Greenland's freezing terrain.
3. Air 1 or Bird 1: Avian and airborne vectors help the pathogen jump from mainland Europe into Scandinavia so Norway catches the disease before global border measures begin.
4. Extreme Bioaerosol: If available (unlocked by combining Air 2 and Water 2), purchase it to let the pathogen bypass ship and aircraft filter systems.
5. Devolve Early Lethal Symptoms: If a symptom mutates spontaneously, devolve it immediately—especially on plague types that refund or do not penalize DNA for devolution. Keep lethality at zero until Greenland reports its first infected citizens.

Once Greenland has confirmed infections, you can safely evolve lethal symptoms to eliminate the global population.

The Greenland Start

Starting your plague directly in Greenland eliminates the seaport bottleneck entirely.

Choosing Greenland as your starting country places Patient Zero inside the territory on day one, removing the risk of being locked out by port closures. However, this setup changes your early pacing:

• Slow Initial DNA: Greenland's low population generates DNA points much slower than dense regions like India or Saudi Arabia.
• Early Cold Resistance: You must purchase Cold Resistance 1 immediately so the pathogen can spread locally in an arctic climate.
• Rush Water Transmission: You must transmit outward to Norway by sea to reach the rest of the world. Prioritize Water 1 and Water 2 as your first major transmission traits.

Pathogen-Specific Port Bypasses

Special plague types feature distinct mechanics that bypass maritime shipping rules entirely:

• Neurax Worm: Evolve the Trojan Plane ability. This lets you select an infected country and send an airliner directly to Greenland, ignoring closed seaports.
• Necroa Virus: If Greenland isolates its harbor, evolve Zombie Horde traits. Assemble a horde in Norway or the United Kingdom and send them across the ocean to create an outbreak on the island.
• Simian Flu: Build an ape colony in Europe and direct intelligent ape migrations across the water to colonize Greenland without relying on human travel.
• Shadow Plague: Use your primary Vampire’s flight ability to travel straight to Greenland, using Blood Rage to feed on the local population directly.