Hatchery: foundational structure of every zerg colony

The hatchery was the foundational structure of every zerg colony in the Koprulu sector. Wherever the Swarm took root, from the ash wastes of Char to the fringe worlds of the Terran Confederacy, a hatchery came first: a living organ of the Swarm that spread creep across the ground, birthed the larvae from which every zerg breed emerged, and digested minerals and vespene gas into a nutrient form the Swarm could use to feed its mutations. The zerg guarded their hatcheries with fanatical zeal, and their enemies, terran and protoss alike, learned to make the structures their first target, because as long as a hatchery endured, the colony around it could always be reborn.

The engine of the Swarm#

Three vital processes ran through every hatchery. The first was the production of creep, the living carpet that most zerg structures required in order to be built and that sustained the colony growing across it. The second was the birthing of larvae, the maggot-like base strain of the Swarm from which all other zerg breeds were mutated. The third was digestion: the hatchery broke down harvested minerals and vespene gas and converted them into a nutrient form that the zerg could use to feed their endless mutations. No colony survived without all three, and so no colony existed without a hatchery at the center of it.

The structure carried a role beyond raw production. The hatchery served as the central point from which genetic information was distributed out of the hive cluster to drones and larvae, keeping every creature in the colony connected to the Swarm's evolving library of strains. Because the hatchery was the key to producing new strains, the zerg were known to defend the structure with fanatical zeal, throwing broods against any force that threatened it. Certain attendants of the Swarm, among them the queens that watched over its colonies, could be spawned directly from the hatchery itself without the need for larvae.

Seed of every colony#

The hatchery began life as a drone. When a new colony was needed, a drone metamorphosed into the structure, and from that single transformation an entire hive cluster could grow. Together with the extractor, the hatchery was one of the only zerg structures that could be built without pre-existing creep beneath it, which made it essential to any attempt at expansion: the hatchery went down first on bare ground, its creep spread outward, and only then could the rest of the colony's organs take root.

A hive cluster, sometimes called a hatchery cluster, was the zerg equivalent of a colony or base, sustained by creep and serving as the point from which zerg forces mined resources and spawned their broods. Hatcheries and their evolved forms sat at the heart of every such cluster, with drones used to establish new ones wherever the Swarm pushed its borders. The resilience of this cycle shaped terran military doctrine. The Terran Dominion stressed that its marines be obsessively thorough when carrying out zerg eradication operations, because just one surviving larva could mutate into a drone, which in turn could mutate into a hatchery, and thus give birth to a reborn zerg colony. A young hive held the genetic code for only the most basic breeds, such as the drone, but as it grew and developed new structures its library of strains expanded, and with a command from the Overmind, a cerebrate, or an overlord, its larvae would pupate into whatever the colony required.

From hatchery to lair and hive#

The hatchery was only the first stage of the structure's life. As a colony matured, the hatchery could mutate into a lair, and later into a hive, each form unlocking deeper stages of the Swarm's evolution while continuing the work it had performed since it was a hatchery: birthing larvae, maintaining the creep, and digesting minerals and gas.

The hive was the final form and the primary structure of the zerg. Protected by a dense exoskeleton and granted full access to the Overmind's pool of knowledge, a hive gave the being commanding it the potential to loose the full fury of the Swarm. Its genetic model was extremely complex, and would have been indecipherable to any terran scientist. When under attack, hives could harden their hulls with bony protrusions, allowing them to shrug off weaker strikes. During the Great War and the Brood War, the Swarm could also deploy a variant known as the Char hive, which glowed with the perpetual heat it generated; the warmth was mild enough that attackers at close quarters took no harm from it, but the drones and larvae within took advantage of it on the colder planets of the Koprulu sector.

Targets of the Great War#

From the first zerg incursions into Confederate space, hatcheries and their clusters drew the sector's armies. On Chau Sara, General Edmund Duke led Alpha Squadron in the defense of the city of Los Andares, then attacked the main xenomorph hive cluster on the planet. The attack succeeded, but it only delayed the inevitable, and the zerg took control of the world before protoss fire incinerated it.

The protoss fought the same battles on their own soil. During the war for Aiur, Aldaris directed Artanis against the zerg hive cluster at Scion. The cluster was destroyed, but in the army's absence the garrison that Fenix led at Antioch was attacked by overwhelming force.

The Swarm also carried its hatcheries beyond planetary surfaces. Char Aleph, an orbital platform the Terran Confederacy had built after the Guild Wars to house maintenance teams for Char's automated mining sites, was infested by the zerg during the Great War and used as an orbital nesting site and hatchery. Sarah Kerrigan later made the platform her base of operations, bringing Matriarch Raszagal there as a hostage to hold against Dark Prelate Zeratul.

Nuclear fire on Shi#

In the years after the Brood War, the hatchery remained the anchor of zerg infestations on the fringe worlds. When a team of ghost trainees was dispatched to Shi, the fourth planet of its system, to rescue four heirs of the Old Families, the trainees Aal Cistler and Dylanna Okyl launched a nuclear missile that Nova Terra guided onto a zerg hatchery cluster. The strike succeeded, but the rescue went badly: the heirs were recovered, yet the team was forced to shelter in the badly damaged battlecruiser Cyrus while zerg from another hatchery cluster swarmed against them. While the soldiers worked to repair the grounded ship, Gabriel Tosh and Terra engaged the remaining hatchery directly. The zerg broke off their assault and retreated to defend the structure, and the reprieve allowed the Cyrus to depart with the survivors.

Under the Swarm reborn#

When Kerrigan rebuilt her Swarm during the Second Great War, hatcheries again marked every stage of her reconquest. On Astrid III, Abathur discovered a feral zerg hive cluster whose hatcheries morphed zerglings with unusual speed. Kerrigan took control of the hive, and Abathur explained that it made use of swarmlings, a strain in which a single egg produced three zerglings.

On Char itself, hatcheries anchored the struggle for the Swarm's leadership. In the Acid Marsh, where Kerrigan had once stored millions of zerg eggs for future use, Broodmother Zagara established her hive cluster to gather as many eggs as she could. When Kerrigan returned, she raised her own cluster near a birthing pond, defended it against the troops Zagara sent against her, and gathered enough eggs to spawn an army that destroyed Zagara's hive cluster, though she spared the broodmother herself.

Terran arms told the other side of the same story. During the raid on Char, the forces assembled under Crown Prince Valerian Mengsk defeated the zerg at the planet's primary hive cluster, and at that cluster the charged Keystone stripped Kerrigan of her infestation. From the first burning of Chau Sara to the last battles of the End War, the pattern held: to strike at the Swarm was to strike at its hatcheries, and to leave even one standing was to leave the zerg a future.