Lore & World: Nauvis, Planets, Biters Guide

Factorio’s lore sketches a near-future setting where interstellar travel, alien worlds and industrial ambition intersect; it explains why the player builds automated factories, why hostile lifeforms attack, and what the distinctive planets and artifacts scattered across the galaxy mean for the campaign and exploration.

Setting and stakes

The player begins on a planet called Nauvis, tasked with building a factory that will eventually enable an interstellar program. The need to escape (or expand) motivates rapid automation and resource extraction.
Pollution from industrial activity provokes and expands native lifeforms, producing an escalating conflict: as pollution spreads, local fauna grow more numerous and more dangerous, forcing players to plan defenses or alter tactics.

Native life and conflict

The main hostile lifeforms are the biters (撕咬虫). They exist in multiple sizes — small, medium, big and behemoth — and attack by swarming and direct biting. Biters have different health, damage, movement speed and attack ranges as they scale up, and larger variants can break walls and ignore defenses that would stop smaller forms.
Biters are tied to pollution: individual attacks or nests trigger when pollution reaches thresholds around them, and the overall evolution of biter types in an area is linked to the player's pollution output.
Other native threats appear on different worlds (for example, Vulcanus has a unique giant hostile called the "Demolisher" that does not evolve, respawn, or roam far), giving each planet its own tactical considerations.

Planets, regions and ruins

The Factorio campaign and endgame involve reaching and visiting other planets. Each planet presents distinct biomes, resources and hazards that shape how you build and defend factories there.
Fulgora: a planet whose surface features oceans of heavy oil and islands with varying concentrations of Scrap. Islands and continents host ruins that imply an unknown prior civilization; nights bring dangerous lightning storms that threaten unprotected installations.
Vulcanus (Volcanic worlds): characterized by lava, volcanoes, sulfur and extensive cliffs. Its environment evokes classical lava-planet imagery and is suited to smelting and heavy industry; cliffs are numerous but can be removed with special cliff explosives found or unlocked on-site. The planet contains Demolishers, large stationary monsters that, once defeated, do not respawn, allowing more straightforward factory expansion than on Nauvis.
Planet maps and routes between them are described by distances and asteroid/rock distributions; asteroid charts show relative abundances of metallic, carbonaceous and oxidic asteroids by fragment size along interplanetary routes.

Ruins, artifacts and implied history

Multiple planets show ruins and remnants of an earlier technological civilization. Fulgora’s ruins and scattered Scrap suggest a prior presence that left behind salvageable materials.
Lightning-affected stones and other planetary curiosities (for example, naturally occurring struck-sand glass analogues) hint at past catastrophic events and contribute to world-building details.

Technology and cultural references

Several in-game items and values contain deliberate cultural or pop-culture references embedded in their numbers and descriptions. For example, Nuclear Fuel’s energy value references the "1.21 gigawatts" gag from Back to the Future.
Some items or mechanics existed in the game data before being officially enabled in gameplay or expansions (for example, the railgun weapon), which is reflected in lore flavor and developer touches.

Gameplay implications of lore

Pollution-driven evolution of enemies is a lore-backed rule: industrial expansion incurs a living response from the planet, which justifies building defenses, reducing pollution, or relocating to new planets.
Planet-specific features explain why players might prefer one world over another for particular tasks: Vulcanus’s smelting-friendly setting and non-respawning Demolishers favor rapid build-up, while Fulgora’s Scrap and storms reward island-hopping scavenging and lightning-aware planning.
Ruins and scrap fields provide both narrative texture and practical materials, reinforcing the idea of building atop previous civilizations’ leftovers.

Flavor details and trivia

Steam in Factorio is intentionally treated as a special fluid: it is the only fluid characterized in-game as a non-liquid and cannot be stored in barrels; its tank gauge fills top-down.
Wood is the only starter craft resource in the base game that cannot be automated or produced; initial wood can technically carry a player through to the game’s completion without unlocking trees.
Many planets, items and units carry names and imagery drawn from mythology (e.g., Vulcanus/Vulcan) or real-world concepts (lava planets), reinforcing familiar archetypes within the sci-fi setting.

The lore of Factorio is intentionally sparse and suggestive: environmental details, artifacts, planet composition and enemy behavior provide a consistent background that explains the player's objectives (build, automate, escape) while leaving room for emergent stories created by each playthrough’s logistics and conflicts.