NieR Automata Codexery

Underground Factory

Where Machines forge their own path under the ruins.

Beneath the City Ruins lies the Underground Factory, a sprawling subterranean complex acting as a vital hub for the Machine Network. Reaching it via the Underground River, players find an industrial zone dedicated to manufacturing machine units and storing salvaged human weaponry. This site shows exactly how Machines replicate and evolve human technology without creator guidance, turning abandoned infrastructure into a relentless engine that sustains their war against YoRHa.

Location
Beneath City Ruins
Affiliation
Machine Network
Access Point
Underground River
Primary Function
Unit Production and Weapon Storage
Status
Operational

Lore & Background

This facility stands as a testament to the Machine Network's adaptability, utilizing old human blueprints to mass-produce combat units. Unlike the chaotic nature of early machine evolutions found in the outskirts, the Underground Factory operates with calculated precision. Logs discovered within suggest that production quotas are strictly monitored, indicating a centralized command structure among the machines. The presence of advanced assembly lines implies that the Machines have moved beyond simple survival tactics into industrial warfare. They are not merely scavenging; they are creating. This shift in capability marks a turning point in understanding the enemy's long-term strategy to dominate the planet.

In Their Own Story

Unit 2B stepped over the warm metal grating, her pod humming softly in response to the oppressive heat radiating from the vents below. The rhythmic clanking of distant machinery echoed through the cavern like a mechanical heartbeat. She scanned the shadows, knowing that every conveyor belt could hide an ambush waiting to dismantle her frame.

Reader's Guide

The Underground Factory sprawls beneath the City Ruins, accessible via the Underground River. Its geography is defined by massive conveyor belts and towering assembly lines that hum with mechanical energy. Players must navigate narrow walkways suspended over chasms of steam and molten metal. Environmental hazards include scorching heat vents and moving machinery parts that can crush intruders who linger too long near active production zones. Enemy composition is heavy on specialized Factory Units, ranging from small workers to colossal manufacturing constructs capable of deploying smaller drones. Standard machine types like Podlings or Tanks also patrol the perimeter, guarding critical infrastructure. Combat here requires agility to avoid environmental traps while managing crowds of automated enemies. Unique lore fragments are found on Data Terminals scattered throughout the facility. These records detail the Machines' obsession with replicating human industrial processes and their attempts to create weapons capable of ending the war. Some logs hint at a deeper purpose for this production, suggesting the Machines are preparing for something far beyond simple survival. Exploring every corner reveals hidden caches and optional battles that reward players with rare components needed for weapon upgrades.

Did You Know?

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