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Oxygen Not Included is a space colony simulation and survival game developed and published by Klei Entertainment. Trapped inside an alien asteroid, your mission is to help a group of duplicants survive by constructing a fully automated underground colony capable of producing oxygen, food, clean water, electricity, and everything needed to stay alive.
Unlike traditional city builders, every system in Oxygen Not Included is interconnected. Heat, gases, liquids, germs, and electricity are all simulated in real time, requiring careful planning and efficient engineering. As your colony grows, you'll research advanced technologies, automate production with complex machinery, explore hidden biomes, and discover rare resources that unlock new possibilities.
With deep management mechanics, endless replayability, and procedurally generated worlds, Oxygen Not Included offers one of the most rewarding colony simulation experiences available for strategy fans.
Build and manage a fully functional underground space colony.
Produce oxygen, food, clean water, and sustainable power.
Manage duplicants with unique skills, personalities, and stress levels.
Simulate gases, liquids, temperature, and electricity in real time.
Research new technologies to unlock advanced buildings and automation.
Explore procedurally generated asteroid biomes.
Mine valuable resources and rare materials.
Design efficient plumbing, ventilation, and electrical systems.
Automate production using conveyor rails, sensors, and logic systems.
Handle diseases, environmental hazards, and resource shortages.
Endless sandbox gameplay with high replay value.
Beautiful hand-drawn visuals and charming animations.
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