Oxygen Not Included Free Download

Oxygen Not Included is a deep and richly detailed **space-colony survival simulation game playable on Mac (macOS 10.13+), Windows, Linux, and Steam Deck. Developed by Klei Entertainment, it challenges you to manage a subterranean colony of duplicants inside a hostile asteroid where oxygen, heat, food and resources are scarce — and forgetting to breathe can be fatal. Your task is to keep your colonists alive and thriving by carefully balancing life support, resource production, infrastructure and environmental hazards, all while exploring procedurally-generated worlds.

From excavation and complex gas, liquid and temperature simulations to power grid and plumbing systems, Oxygen Not Included lets you control every aspect of your base. You must optimize ventilation, oxygen generation, food production, sanitation and stress management to prevent disaster, all under pressure from physics-driven gas and fluid behavior and environmental challenges like heat and toxic air. The game’s highly detailed systems reward clever design and long-term planning as colonies grow larger and more complex.

Beloved by simulation fans for its depth, emergent gameplay and replayability, Oxygen Not Included offers hundreds of hours of strategic problem-solving as you expand your subterranean settlement into a self-sustaining outpost — or watch it collapse under its own inefficiencies.

Key Features:

• Space colony survival and simulation set inside an asteroid.

• Playable on Mac, Windows, Linux, and Steam Deck.

• Manage duplicants’ oxygen, food, stress and health.

• Complex gas and liquid physics with real-time diffusion systems.

• Temperature and thermodynamics impact survival.

• Deep base-building with plumbing, power and automation.

• Procedurally generated worlds for varied replayability.

• Resource management across food, water, energy and waste.

• Psychological stress effects and leisure systems.

• Steam features: achievements, cloud saves, family sharing.