The Colony Ship

Lore & Background

The duplicants are small, brightly suited humanoids who find themselves stranded on a planet whose atmosphere is thin, whose geology is layered with toxic and combustible strata, and whose surface offers little in the way of shelter. Their only path forward is upward: build a colony deep in the crust, extract what the planet will yield, and construct a vessel capable of punching through the sky. The Colony Ship is not merely a vehicle in this story; it is a promise. It is the reason a duplicant drags a heavy metal bar through a tunnel at 2 a.m. in-game, the reason a squishy is tucked under a blanket in a tiny bedroom, the reason the whole operation exists.

The planet itself is a character. Its cross-section reveals strata of rock, dirt, metal, and exotic materials, each with its own hazards—magma, toxic gases, flammable pockets. The duplicants must read this geology like a map, carving tunnels and chambers that balance resource access against the constant threat of environmental collapse. The ship sits at the apex of all that labor, a small bright shape against the black of space, waiting to be filled with fuel and courage.

What makes the Colony Ship resonate with players is the gap between its simplicity as a goal and its enormity as a task. You know exactly what you are building. You know every component. But getting there—keeping everyone alive, keeping the air breathable, keeping the lights on through a power crisis—turns a straightforward engineering project into a long, tender, often chaotic story about a community trying not to die.

In Their Own Story

The workshop smells of hot metal and recycled air. Three duplicants in orange and teal suits hunch over the rocket's oxidizer tank, welding seams with focused, wordless precision. A squishy the size of a teacup rides on the shoulder of the lead engineer, chirping softly at every spark. Below them, through the glass floor of the workshop, the colony hums: pipes carrying oxygen in steady blue pulses, a kitchen where someone is frying something that will absolutely not survive to dinner, a greenhouse glowing faintly green in the dark. Above, the sky is a flat, indifferent black. No stars. No rescue. Just the ship, half-finished, waiting. The lead engineer sets down the welder, wipes soot from her visor, and looks up at the dark. Then she picks the welder back up. There is still a lot of work to do.

Reader's Guide

In Oxygen Not Included, the colony and the ship work as a single system with two phases. The colony is your living, breathing infrastructure: bedrooms, kitchens, greenhouses, oxygen generators, and the pipe-and-duct network that keeps every duplicant fed, warm, and breathing. Its narrative purpose is survival—turning a hostile cross-section of rock into a home. Key structures include the greenhouse (food production), the oxygen generator or algae (breathable air), the kitchen (meal preparation), and the workshop (fabrication). The colony interfaces with the player's base directly: you are the base. Every tunnel you dig, every room you insulate, every priority you assign to a duplicant's task list is part of the colony's design.

The ship is the endgame structure that sits above the colony, at the top of your excavation. Its narrative purpose is transcendence—turning survival into escape. It requires fuel, oxidizer, and specific metal components, which means your colony must be producing surplus resources. The engineering philosophy that makes the whole layout work is vertical zoning: heavy, messy, hot production (smelting, fuel processing) goes deep; clean, sensitive systems (oxygen, food, living quarters) go mid-level; and the ship sits at the top, protected and accessible. Community layouts often follow a "stack" design, with a central vertical shaft connecting all layers, surrounded by ring-shaped functional zones. The design philosophy is redundancy and flow: duplicate critical systems, keep pipes short, and ensure that no single failure cascades into colony-wide catastrophe.

The story significance of the ship is that it reframes everything before it. Every duplicated pipe, every insulated room, every squishy named and petted becomes a chapter in the lead-up to launch. The colony is the story. The ship is the ending.

Did You Know?

• Duplicants must be supplied with breathable oxygen, food, and a comfortable temperature range simultaneously; neglect any one of these and they will begin to suffer, and eventually die.
• The game's signature cross-section view lets the player see the entire planet's geological strata at once, making geology a core strategic resource rather than an abstract map.
• Squishies are small, colorful creatures that duplicants can befriend and keep as companions; they add a layer of emotional management to an otherwise systems-heavy survival loop.
• The planet contains multiple distinct biomes with different materials, hazards, and resource yields, meaning the player must adapt their colony's layout and extraction strategy as they dig deeper or wider.