Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
Recent Reviews:
Mostly Positive (801) - 77% of the 801 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (4,025) - 87% of the 4,025 user reviews for this game are positive.
Release Date:
May 18, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Since 2012, Klei has used Early Access as a tool to gather feedback and build our games in collaboration with our community, producing games like Don’t Starve, Don’t Starve Together and Invisible Inc.. We’ve found this process works for us, and we hope you find it works for you, too.

Our current project, Oxygen Not Included, has already majorly benefited from the feedback provided by players during its Alpha period. By releasing this game in Early Access, we hope to continue to grow our community and get more people involved in its development.”

Approximately how long will this game be in Early Access?

“We still have a lot more in store for Oxygen Not Included, and plan to continue growing and updating the game well into 2018.”

How is the full version planned to differ from the Early Access version?

“The plan for the full version of Oxygen Not Included is to create even more content to allow players to manipulate, automate, and harness the world their Duplicants live in. Duplicants will also become more robust as their needs and abilities evolve over time. To complement this, there will be new biomes to discover, new creatures to interact with, world events to deal with, and more.

We will also be exploring the lore of the game, slowly uncovering the history of the world and why the duplicants are trapped on a giant rock hurtling through space.

Mod support is also very important to us, so we expect to have full workshop support by launch or shortly thereafter.”

What is the current state of the Early Access version?

“Oxygen Not Included currently contains all the core systems that will be evolved and iterated upon during Early Access such as thermodynamics, density, plumbing, stress and hunger. The game has already been played by over 150,000 players in its current state, many of whom report hundreds of hours played. We’re amazed by the breadth and depth of creations that players have made and we’re looking forward to building upon that.”

Will the game be priced differently during and after Early Access?

“The base price may be increased upon release from Early Access.”

How are you planning on involving the Community in your development process?

“We're continually talking to our community about our design process and keeping them informed of our decisions and improvements with regular updates. Please join the discussion on our forums at http://forums.kleientertainment.com/forum/118-oxygen-not-included/”
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Recent updates View all (25)

October 5

Oxygen Not Included - Oil Upgrade Available Now!

Plumbing further into the depths of the asteroid, our Duplicants have made a fortuitous discovery - oil! Will the colony flourish into an energy-rich paradise? Or devolve into a mire of sweltering heat and suffocating fumes?

Welcome to Oxygen Not Included - Oil Upgrade!

So What's New?


Oxygen Not Included has received a whole new collection of Hydrocarbon resources, along with research and buildings to manipulate them to your benefit. Among these new Hydrocarbons are Crude Oil and Petroleum, which you can use to manufacture versatile plastics for advanced technologies and luxury commodities.

Key Features
  • Oil Biome: Journey down into the asteroid's depths to obtain the valuable Crude Oil that awaits in this new biome. You may even make some new creature friends along the way.
    Oil Wells and Geysers: Seek out Oil Geysers and tap them with Oil Wells to extract their precious fuel. You may need to sacrifice some fresh water in the process, however.
    Petroleum Generator: Use the new Oil Refinery to produce Petroleum and fuel your new high-powered Petroleum Generator.
    Plastics: The Polymer Press will allow you to start manufacturing your own plastics, unlocking a new tier of advanced and germ-resistant materials. Try not to heat them up though; Naphtha byproducts are no use to anybody.
Suits are heavy-duty hazard gear designed to keep your Duplicants breathing in any environment. With these new additions, you control when and where Duplicants must wear protective suits as they go about their work and keep your base running.

Key Features
  • Atmo Suits: Crafted at the new Exosuit Station, Atmo Suits increase digging speed and shield Duplicants from unlivable temperatures, gases, and conditions. They may slow your Dupes down a bit, but being slow is better than being dead.
  • Checkpoints and Docks: Use new Suit Checkpoints to mark off areas where Duplicants must wear Atmo Suits and prevent them from entering dangerous places unprotected. Once done they've finished their business, you can store and refill your exosuits back at the Suit Docks located next to your Checkpoint.
  • New Overlay: Enter the Exosuit Overlay to view docks and the checkpoints marking where Duplicants must change into suits.
And More
  • Rooms: When areas you've built fulfill certain requirements, they will now be recognized as designated rooms. For example, an area with a toilet, sink, and a door will now be recognized by Duplicants as a "Bathroom". Completing rooms will grant bonuses to the buildings within them and make Duplicants more efficient.
  • New Overlay: Enter the Rooms Overlay to view all current completed rooms in your base and the bonuses being granted by them.
  • New Creatures and Buildings:
    • Sink: Tired of filling and emptying Wash Basins all the day long? Well now you can build your own plumbable Sinks, complete with clean and dirty water pipes!
    • Plastic Ladders and Tiles: Use your brand new plastics to improve the infrastructure in your colony. Plastic ladders and tiles are faster to run on, and their natural antiseptic properties will even keep germ spread at bay!
    • Slicksters: These slippery little scoundrels can help you recycle your colony's excessive carbon dioxide production into sweet, sweet fuel. Plus they're cute!
    • Comfy Beds: The meaning of the word "discomfort" is sure to fade from collective consciousness once you build your Dupes these fancy beds.
    • Heavi-Watt Joint Plate: Run Heavi-Watt Wire through walls with this industrial joint plate.
  • Apothecary Unretired: The Apothecary has been reintegrated and can now be used to create general medicines for sick Duplicants, or tasty Vitamin Chews to boost individual immune systems.
  • Research Tree Changes: Existing techs have been separated out into more chunks so you have more choices about how to tackle your tech problems, and costs have been rebalanced to fit.
  • Improved Daily Report Breakdowns: Reports now display more varied and accurate information about your colony's activities throughout the day, for example - how many embarrassing bathroom accidents your Duplicants had that cycle.
  • Disease Mass Limits: New disease mass limits mean germs can no longer reproduce ad infinitum, which is nothing to sneeze at.
  • Tons of bug fixes, rebalances, QOL additions and more!
  • [BETA] Simplified Chinese Translation: We've added a new BETA translation in Simplified Chinese. Additionally, community translations are still available and we are working to provide more translations for many other languages as well.
A big thank-you to those of you who joined in on the Oil Upgrade Open Testing - your reports, feedback and contributions mean a lot to us and we really appreciate you lending us your time to test the game.

Enjoy your time with the Oil Upgrade, and we'll see you in space!

HOTFIX 236191
  • Idle dupes returning their suit should now put their suit in the locker instead of dropping it on the ground if the locker they are returning it is closer to them than the arrow it is attached to.
  • Fixed a bug where you could no longer dump the contents of Storage
  • Lockers onto the ground.
  • Duplicants should no longer sometimes ignore Storage Locker settings.
  • Duplicants should no longer deliver food to a Refrigerator if that Refrigerator is not set to accept that food.
  • Airflow tiles should now be properly detected as a room wall.
  • Fixed a bug where rooms were not being properly detected.
  • Newly discovered resource categories will no longer be automatically delivered to storage boxes where the storage box does not have the all button checked.
  • Fixed a crash that could occur when dupes are working at a fabricator.
  • Fixed a crash that could occur during room detection.
  • Fixed a crash that could occur when going to the bathroom.
  • Fixed a bug where circuits were no longer overloading.
  • Animal Relocator selection box should now match the size of the art.
  • Fixed a crash that could occur if a translation had bad format specifiers for the Duplicant personalities.
HOTFIX 236264
  • Fixed a crash that could occur when using Animal Traps
  • Fixed a crash that could occur when destroying electrical buildings
  • Fixed a crash that could occur when inspecting the atmosphere section of a plant
HOTFIX 236679
  • Research screen scroll bar should no longer be missing
  • Duplicants should no longer get Food Poisoning/Slime Lung when using the Impervious Immune System setting
  • Stress vomiting Duplicants infected with Hypothermia should no longer vomit Hypothermia germs
  • Wearing a suit should prevent your Duplicants from getting the "Unclean" effect when stepping in liquids meaning they should no longer want a shower while using a Suit
  • Updated Simplified Chinese localization
180 comments Read more

September 20

Oil Upgrade Preview Now Available!

Hey everybody!

In our most recent roadmap update post we announced that the time between Oxygen Not Included updates has been reduced down to about six weeks; this is great because it means more updates for you, but it also means less testing time for us. For this reason we've decided to open our testing branch to all of our Early Access players.

Starting today, anyone who owns Oxygen Not Included and is interested in testing new content will be able to access the Upgrade Preview branch on Steam and play the new update two weeks before it goes live. If you choose to participate in open testing next update, thank-you! Your feedback is important to us and helps us shape future content.

What does this preview contain?

The following content is available in the Oil Upgrade preview:
  • Oil Biome
  • New Elements: Oil, Petroleum, Plastic
  • New Creature: Slicksters
  • New Medicinal Plant: Balm Lily
  • New Exosuits: Allow Duplicants to venture safely into new locations
  • New Buildings:
    • Oil Refinery
    • Well Cap
    • Petroleum Generator
    • Polymer Press
    • Plastic Ladders
    • Plastic Tiles
    • Comfy Bed
    • Sink
    • Exosuit Station
    • Exosuit Checkpoint
    • Exosuit Dock
    • Heavi-Watt Tile Bridge
    • High Pressure Gas Vent
    • Animal Trap and drop-point
  • Apothecary reintroduced
    • All-purpose Placebo pills
    • Vitamin Chews to boost immune systems
  • Disease population now limited by the mass of the object it's on
  • New "Room" mechanic: Better manage medical facility assignment, and to give poor Duplicants something to aspire to
What is open testing?

"Open testing" means players get to test drive new content early and give us feedback and suggestions before it goes live. Because this is a preview of the upgrade being released on October 5th, it's pretty likely you'll encounter bugs or crashes while playing these builds. We'll try to fix any problems that crop up as quickly as we can, but it's possible you'll lose progress in your games while playing the preview.

Please also be aware that once a save is loaded in the Oil preview, it cannot be reopened again in the Outbreak Upgrade or previous builds.

What do I do if I find a crash or a bug?

Post it up on the Bug Tracker and we'll fix it as soon as we can. If you can attach a copy of your save file to your report, that helps us even more as we can pinpoint the source of problem more quickly.

Do I have to play the open testing build?

Nope! If you'd prefer to only play a stable build, you can continue to play in the current Early Access branch until Oil releases in full on October 5th. Playing the Open Testing build isn't necessary, but it helps us a lot to receive your feedback and reports - if you're interested, try it out!

How do I become an open tester?

There's no sign up or registration for becoming an open tester. If you own Oxygen Not Included and want to test the Oil Upgrade preview, all you have to do is play the Open Testing build on Steam.

How do I play the open testing build?

Just switch your branch on Steam using the instructions here. Look for the branch "oil_upgrade_preview". This branch does not require a password.

That's it! We hope you'll enjoy this preview of what's to come, and thank-you for your help testing out the new Upgrade!
253 comments Read more
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About This Game

In the space-colony simulation game Oxygen Not Included you’ll find that scarcities of oxygen, warmth and sustenance are constant threats to your colony's survival. Guide colonists through the perils of subterranean asteroid living and watch as their population grows until they're not simply surviving, but thriving...

Just make sure you don't forget to breathe.

Build Extensive Bases and Discover What it Takes to Survive:

Everything in your space colony is under your control, from excavation and resource allocation right down to plumbing and power systems. Resources will begin depleting with your first breath, however, so be sure to dig fast if you want to live.

It’s Mind Over Matter with Stress Simulations:

Keep the psychological impact of survival at bay with fun leisure activities, great accommodations and even better food for your colony. Duplicants each have different and potentially destructive ways of reacting to stress, so be sure to always keep them happy. Whatever the cost.

Avoid Boiling with Thermodynamics:

Temperature control is a constant concern in space; too cold and you'll freeze, too hot and you'll fry. Keep tabs on ambient environmental temperatures and your colony's heat production to maintain a nice, cozy atmosphere for your colonists.

Enhance Efficiency through Complex Gas and Liquid Simulations:

Create interlocking pipe systems to swiftly deliver fuel and liquid to critical areas of your base. Plan well and be rewarded as your colony transforms into an imperishable, well-oiled machine.

Take Charge with Power Grid Simulations

Choose from a multitude of power sources including coal, hydrogen, natural gas or just plain old elbow grease. Manage power runoff, circuit overloads and meltdowns to keep your colony running smoothly.

Always Keep Yourself Breathing:

Enter the Oxygen Overlay and watch air moving through your base in real time. Monitor carbon dioxide accumulation and oversee oxygen generation processes to mold your colony into a veritable deep-space oasis.

Waste Nothing through Extreme Recycling

Make use of every last resource for a base that truly exemplifies efficiency. Recycle waste into precious fuel, process unbreathable gas into air or harness the natural bodily processes of wild creatures for food. If you’re clever, you might even be able to run a base off colonist farts.

Explore Diverse, Procedurally Generated New Worlds:

Summon new worlds with a push of a button. Experience tons of untamed space rocks, then suffocate to death in them!

System Requirements

Mac OS X
    • OS: Windows 7 (64 bit)
    • Processor: Dual Core 2 GHz
    • Memory: 4 GB RAM
    • Graphics: Intel HD 4600 (AMD or NVIDIA equivalent)
    • DirectX: Version 11
    • Storage: 2 GB available space
    • OS: OSX 10.9
    • Processor: Dual Core 2 GHz
    • Memory: 4 GB RAM
    • Graphics: Intel HD 4600 (AMD or NVIDIA equivalent)
    • Storage: 2 GB available space

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