Oxygen Not Included

Oxygen Not Included is a space-colony simulation about keeping a growing population alive beneath the surface of an asteroid. Oxygen, warmth and sustenance are always scarce, and resources start to run out as soon as your colonists take their first breaths. You direct their work and manage the colony as it grows from barely surviving to thriving.

Build your colony

You control excavation, resource allocation, plumbing and power systems. Dig for resources and build an extensive base, connecting pipes to deliver fuel and liquids where they are needed. Plan your systems carefully to make the colony more efficient.

Keep colonists well

Each colonist, known as a Duplicant, can react to stress in a different and potentially destructive way. You can help manage their psychological strain with leisure activities, good accommodations and better food. Temperature is another constant concern: monitor environmental temperatures and the heat your colony produces to prevent conditions from becoming too cold or too hot.

Manage air and power

The Oxygen Overlay shows air moving through your base in real time, helping you track carbon dioxide buildup and oversee oxygen production. You can power the colony with coal, hydrogen, natural gas or manual effort, while managing power runoff, circuit overloads and meltdowns.

Reuse resources

Recycle waste into fuel, process unbreathable gas into air and use the natural bodily processes of wild creatures for food. The game also allows you to run a base using gas produced by colonists.

Explore new worlds

You can generate new worlds at the push of a button, exploring a range of untamed space rocks.