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:
Very Positive (344) - 89% of the 344 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (8,965) - 91% of the 8,965 user reviews for this game are positive.
Release Date:
May 18, 2017

Sign in to add this item to your wishlist, follow it, or mark it as not interested

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/”
Read more

Buy Oxygen Not Included


Recent updates View all (35)

March 22

Ranching Upgrade Mark I Available Now!

It's been a hard six weeks of survival for our poor stranded Duplicants, but something adorable is on the horizon that's sure to make them smile - Critter Ranching! With new tools at their disposal our Duplicants can interact with critters in a variety of cute and helpful ways. Will Hatches become Dupe's best friend? Is there enough grooming in the world to make a Puft smell good? What DO Shine Bugs eat?

These questions and more can be answered in Oxygen Not Included: Ranching Upgrade Mark I!

Wait... What's "Mark I"?

Our team has a lot of ideas for where we want to take creatures in Oxygen Not Included... So many ideas, in fact, that they couldn't all fit into one upgrade! This means that Mark I is just the first of two Upgrades (the next being "Mark II"), which will have the same development cycle and release another 6 weeks from now with even more critter-related content for the game.

Releasing two part upgrades in this way gives us time to fully flesh out more complex ideas, iterate on existing content, and try out new things... and while we can't reveal all of what will be in the remaining half of the upgrade, we can say that it will increase the depth of critter loops and utility, and will further build on the mechanical foundations laid in this half of the upgrade. (And maybe there'll be a new species...)

So What's New in Mark I?

Critter Ranching

Critter ranching allows you to interact with critters in a variety of new ways and integrate them into the daily routine of your colony. Duplicants, particularly those employed as Ranchers, can care for Hatches, Shine Bugs, and Pufts to increase their happiness, farm additional resources from them, and even breed new critters for your herd.

Key Features
  • Critter Wrangling: Use the new Wrangle tool and your Ranchers can capture critters alive and move them around your base! No traps required.
  • Critter Care: Tons of new buildings and systems have been implemented to keep your precious critters happy, healthy, and most importantly productive.
    • Needs and Conditions: Each critter species has specific needs that must be met in order to maintain their health and comfort. Temperature, atmosphere, and food needs will all need to be met in order to keep a critter happy, and a happy critter is a productive one!
    • Critter Feeders: Critters are hungry little guys and now have calorie stores just like Duplicants. They'll need to eat regularly in order to stay alive, but luckily feeding them has never been easier! Just pop a bit of unused stone into a Critter Feeder and watch a Hatch munch away!
    • Grooming Stations: Clip those claws, unmatt that fur, and shine those shells! Critters appreciate it when their handlers keep them in tip top shape, so be sure to build a fewer grooming station and let the primping begin!
  • New Ranching Job: This new job comes with a boost to the newly introduce Ranching attribute, and will teach Duplicants the art of wrangling critters in the wild for capture (no traps required!). Dupes who learn the Ranching trade will also be able to use a Grooming Station to give their livestock's happiness a boost from time to time.
  • Critter Reproduction: New reproduction cycles means you can ranch critters to increase their numbers. Raise a flock of twenty Pufts!
    • Happiness: You know, they say "Happiness is a warm Hatch." Well, Happiness is the new metric by which you can see how well your critters are cared for. Creatures with high happiness will not only produce more useful products, but they may even feel comfortable enough to lay some new eggs!
    • Eggs! When a critter's Reproduction stat reaches 100, they will now lay a brand new delicious adorable critter egg. These eggs can be immediately cooked and ravenously eaten raised with the utmost care to produce new critters, allowing you to increase the size of your lovable critter herd.
    • Incubators: Build an Incubator to ensure all your critter eggs are safe, secure, and most importantly, warm. These Incubators are equipped with ideal settings for each known species of critter egg, so go ahead, set it and forget it! (But make sure a Rancher is on hand to oversee the hatching!)
And More!
  • New Database: A new encyclopedia has been added to connect you to a wealth of knowledge about foods, plants, animals, elements, systems... you get the idea! View all stats and functions for buildings and creatures at any time to plan your base to absolute perfection. And who knows? Some mysterious entries may appear from time to time, too...
  • Priority System Tweaks: The "Priorities" screen has been split from the Jobs screen into its own menu and can be used to manage individual Duplicants' priorities. Colony priorities have been replaced with a new "Sub-Priorities" button, which can still be used to set the importance of pending tasks but will be overridden by individual Dupe priorities.
  • 18 New Geyser Types: Tons of new points of interest have erupted onto the scene!
    • Geysers, Fumaroles, Volcanoes, Fissures
    • Copper, Iron, Gold, Co2, Hydrogen and more
    • Both cool and hot temperatures
    • Explore and find them all!
  • Performance Enhancements!
  • Tons of bug fixes, rebalances, QOL additions, and more!
Finally, we'd like to say a big thank-you to everyone who played the Ranching Mark I Upgrade Preview, submitted crash and bug reports, and gave your feedback in our Suggestions Forum. We're always grateful to hear your thoughts and thank you for the time spent playing our game.

We hope you enjoy Ranching Mark I!

[Game Hotfix] 260921 - 3/22/2018
  • Fix crash that could occur when a text box with a link in it was destroyed
  • Updated Database icons for geysers
  • Fix for a number of bugs related to dupes crossing exosuit checkpoints
  • "Rummage" for lockers and vending machines now prioritizes correctly
  • Seasoned Rancher hat artwork updated
  • Hatch eggs are now visible as they are being laid
  • Dupe carrying capacity from strength correctly calculated on load/spawn
61 comments Read more

March 8

Ranching Upgrade Mark I Preview Now Available!

Hello friends!

As we know life always finds a way, and it seems the colony is no different. At lodng last, the critters of the asteroid have begun sustaining themselves thanks to the Ranching Upgrade Mark I. When a critter's needs are all met and they're kept in the right conditions, they can now lay brand new eggs. These can be incubated to hatch new critters, or just used as a delicious source of protein (shh, don't tell them!).

There have also been several other exciting discoveries: The Duplicants have finally gotten their priorities straight with new Priority and Urgency systems, and have begun compiling an extensive Database of useful knowledge about their world! Just in time too, because new geological disturbances have appeared which may require further investigation...

If you're interested, you can help us test this new content for the next two weeks before it goes live. As always we appreciate your feedback, so please share your thoughts and opinions on the Suggestions Forum. Thank-you!

What does this preview contain so far?

The following content is available in the Ranching Upgrade Mark I preview:
    New Ranching Gameplay
    • New Rancher job
    • Critter wrangling
    • Critter needs and conditions
    • Critter reproduction (Eggs!)
    • Critter Feeders
    • Grooming Stations
    • Incubators
    • Critter relocation buildings now lower tech
    Info Database screen
    • Extended descriptions for many entries
    Errand Priorities screen
    • Added more controls for job prioritization
    • Renamed errand priority "Urgency" to distinguish from individual Duplicant priorities
    • Added optional auto-prioritization for job-related errands
    New geyser types
    • More geysers in each new world
    • Variable outputs and dormancy cycles
Check the patch notes for the most up-to-date changes!

For more information and instructions on how to access the preview build check out the post on the official forums: https://forums.kleientertainment.com/topic/88444-ranching-upgrade-mark-i-preview-now-available-258691

HOTFIX - 258798
  • Morbs should once again spit out polluted oxygen.
  • Wrangle tool now displays hover text if you try to wrangle a creature which cannot be wrangled.
  • Hatches should now properly display the 'buried object' marker when spawned inside of a solid tile. This change requires a new world to be generated.
  • Hatches should no longer 'freak out' when landing
  • Creature info panels should now display what is required to capture the creature
  • Build menu should no longer be offset when creating a new game
  • Rancher job now has a ranching perk
  • Main menu should no longer stutter when you have lots of save files.
  • Duplicants can no longer rangle burried hatches.
  • Creatures should now consume the appropriate amount of calories every cycle.

HOTFIX -259043
  • Dupes should no longer ignore sweeping.
  • Slickster should now produce oil instead of slime.
  • Morbs should once again spawn slime on death.
  • Creatures should no longer have blank status items.
  • Omelette recipe should properly display it's ingredients.
  • You can now type to filter elements in the debug element painter.
  • Creatures should now spawn with non zero calories
  • Misc crash fixes.
  • Thermo Sensor should now bring up the automation overlay instead of the power overlay.
  • Creatures should properly eat from the feeder when hungry.
  • Dead dupes should now be properly considered dead after save/load.
  • Chlorine geysers should no longer be missing in newly created worlds.
  • "Unreachable Dig" status item should disappear when it is no longer true.
  • Incubator now requires 240 watts instead of 120.
  • Eggs should now rot.
  • Incubators prevent eggs from rotting.

HOTFIX - 259080
  • Fixed a crash that could occur if a creature was interrupted on the way to the Grooming Station.
  • Fixed a crash that could occur if you killed a creature.

HOTFIX - 259633
  • Critter feeder now organizes it's storage options by creature diet.
  • Creatures now start off wild and become tame after being groomed for a couple of cycles.
  • Wild creatures consume/produce much less than tame creatures.
  • Broad tuning pass on creature consumption/production to account for their life cycles.
  • Creatures should now die if they run out of calories.
  • Geyser are now dormant for a shorter portion of their "big cycle".
  • Improved studied geyser status items.
  • Creatures should now spawn with the appropriate max health.
  • Hatches should no longer spawn in the air when starting a new game.
  • Creatures will now get overcrowded if too many of them are in the same room.
  • Morbs should no longer get stuck spawning polluted oxygen.
  • Using a specific world gen seed should now always spawn the same type of geysers in the same locations.
  • Auto-Sweeper can no longer sweep through Mesh/AirFlow tiles.
  • Fixed an issue where the simulation was destroying gas mass.
  • The priorities screen now allows you to cycle back to auto-assigned(the wrench) if you've manually changed it.
  • Fixed a crash that could occur when browsing the database.
  • Ranchers should no longer try and ranch burrowed hatches.
  • Several databse link fixes.
  • Fixed an issue where the wrong autosave file was being deleted.
  • Fixed crash that could occur when fighting creatures.
  • Fixed a crash that could occur if a creature could no longer reach their ranch station.
  • Debug paint tools now have an eye dropper tool.

HOTFIX - 259840
  • Fixed some performance issues with creatures.
  • Fixed duplicate buildings category in database.
  • Fixed another ranch station crash.
  • Hatches no longer eat non solid elements.
  • Creatures should now prioritize eating out of feeders.
  • New "Database entry not found" page.
  • Grooming station is now prioritizable.
  • Critter drop-off point is now prioritizable.
  • Duplicants should once again take their medicine.

HOTFIX - 260234
  • puft should no longer infinitely inhale
  • creatures should no longer poop out literal tonnes of material
  • fixed a crash that could occur when using a translation containing a database link within a database link
  • removed industrial machinery restriction from creature pen
  • suit locker should now be prioritizable
  • bag created by rangling burrowed hatches should now appear on the ground
  • info screen title label is slightly larger to accomodate different font sizes
  • hatches should no longer be constipated after eating phosphorite
  • fixed layering when dropping eggs from incubator
  • resource screen should now list liquifiable items
  • dupes should no longer ignore showering
  • database button for buildings under consutrction should now work
  • fixed an issue where the travel tube launcher and steam turbine were not
  • responding to their automation inputs
  • items carried by Duplicant should no longer melt during transit preventing
  • infinite fetching loops where Duplicant's would keep failing to transfer small amounts of ore
  • Creatures should no longer starve when offscreen
  • fixed a memory/performance leak

HOTFIX - 260344
  • Geyser study can now be prioritized; study errand is no longer 'emergency' priority.
  • New sound effects for critter grooming, excited, egg-laying, pooping
  • Improvements to incubator art
  • Improvements to hatch eating animation
  • New art for many of the new geysers
  • Updated Puft and Puft egg art
  • Tame hatches have an ID collar
  • Hatch can now hop across gaps with a lower ceiling
  • Formatting improvements to Reports screen
  • Slicksters and Pufts now eat enough to keep up with their calorie needs
  • Geysers don't show status icons until uncovered, and make a notification when uncovered
  • "Urgency" tool renamed to "Sub-Priority" tool
  • Sub-Priority tool now has a diagram, and all sub-priority pickers have a button to open the Priorities screen
  • Added 3 new columns to the Priorities screen: Life Support (mostly critical hauling jobs), Toggle, and Storage (non-sweep locker-filling).
  • "Advanced Mode" added to priorities screen. Further explanation below.
HOTFIX - 260388
  • Creatures will now behave correctly when Advanced Priority Mode is turned on
  • New sounds for adjusting priorities
  • Fix bug where the incubator errand could disappear if it was interrupted
  • More Geyser art updates
  • Auto Job Priority toggle now defaults to Off
In order to help new bases with no or few priorities set, the game has a few "under the hood" prioritization rules. We've observed that in large bases where players have already extensively applied their own priorities, these hidden rules can create unexpected trips across the base. Advanced Mode allows you to turn off those hidden rules for a more predictable experience. Please give it a try and let us know if you encounter any issues!

HOTFIX - 260525
  • Final art for Rancher hat
  • Molten metal/Volcano artwork completed
  • Fix for ingredient amount display at fabricators such as the cooking stations
  • Auto Sweepers are once again allowed to do all kinds of pickup and delivery
  • "Death timer" on slimelung-infected patients is reset when they receive treatment
  • Slime lung death timer reduced from 10 to 8 cycles
  • Fix for steam turbine destroying mass
  • Improvements to steam turbine status items and "Power" panel display
  • Steam turbine temperature requirements slightly lowered
  • Empty Storage chores (on fabricators, bottled liquids, vending machines, etc.) are now prioritizable using either Tidy or Hauling
  • Liquids created inside solid cells will try to move to a nearby non-solid cell.
  • Prevents mass destruction when destroying pipes inside tiles.
  • Fix crash on the Priorities screen
  • Wheezeworts should no longer destroy gasses
125 comments Read more
See all discussions

Report bugs and leave feedback for this game on the discussion boards

Language Packs

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
SteamOS + Linux
    • Requires a 64-bit processor and operating system
    • 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
    • Requires a 64-bit processor and operating system
    • Requires a 64-bit processor and operating system
    • 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
    • Requires a 64-bit processor and operating system
    • Requires a 64-bit processor and operating system
    • OS: Ubuntu 14.04
    • Processor: Dual Core 2 GHz
    • Memory: 4 GB RAM
    • Graphics: Intel HD 4600 (AMD or NVIDIA equivalent)
    • Storage: 2 GB available space
    • Requires a 64-bit processor and operating system

What Curators Say

115 Curators have reviewed this product. Click here to see them.
Customer reviews
High Volume of Reviews Detected:
Exclude  or  View Only
Review Type

Purchase Type


Date Range
To view reviews within a date range, please click and drag a selection on a graph above or click on a specific bar.

Show graph

Display As:
Review Beta NEW!
When enabled, will sort reviews by new Helpfulness score. Read more about it in the blog post.
Show graph
Hide graph
Review Helpfulness Beta Enabled
There are no more reviews that match the filters set above
Adjust the filters above to see other reviews
Loading reviews...