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 (387) - 93% of the 387 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (9,618) - 91% of the 9,618 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 (37)

May 3

Ranching Upgrade Mark II Release

Out in space there's an old saying; "happiness is a warm Hatchling". Well, today there's more than enough happiness to go around in a certain little asteroid!

Ranchers who have long enjoyed caring for the special critters of the colony have finally perfected breeding them in captivity, and they've been rewarded with the very best imaginable thing; baby critters! Bug-eyed Puftlings, tiny Slickster Larva, and chubby Shine Nymphs all await your care, plus some new critters that can't wait to meet you!

What's New in Mark II?

Critter Morphs
Each critter has latent genes that can be activated through specific conditions in diet, environment, and handsomeness. By giving special care to your critters, they will lay new varieties of eggs that hatch into morphs with new requirements and byproducts. Gotta ranch 'em all!

Key Features
  • Critter Morphs: Each critter has one or more variations that can be hatched from special eggs, if conditions are right, enabling new means of production and bonus adorableness.
  • New Critters: Some new wild specimens have been spotted around the asteroid!
    • Drecko: The lizard-like Drecko can be found in secluded corners and high ceilings of the Jungle Biome, nibbling on the local plants and basking in the warmth of the Hydrogen. Its woolly fur grows at an impressive rate and can be sheared off to gain new resources.
    • Pacu: The waters of the asteroid have become newly inhabited as well! Delicious Pacu will swim around, looking lovely and reproducing at a vigorous rate. Maybe you'll keep them around for their meat, or breed one of their morphs for their useful side effects.
  • Baby Critters: Newly hatched critters need time to grow up and learn the ways of the world before they mature. Some Cycle soon, they'll grow up and really start pooping out coal for you!
  • Additional Critter Care Buildings: To assist with the new critters, the Duplicants have developed some new ranching facilities.
    • Shearing Station: This station allows you to you relieve your Drecko of all that itchy fur! Works on scales, too.
    • Fish Trap, Fish Release: Get your little fishies out of the water and into your belly into a cozy new pond.
    • Fish Feeder: Pacu need to eat too! Use this feeder to automatically feed your fish each and every day. So long as you keep it stocked, anyway.

Sandbox Mode
Become the master of space and physics! Use the new sandbox tools to create a world of your own making, or tweak your existing colonies to perfection in this all-new mode. Manipulate elements and temperatures, place buildings free of cost, or add any creature, plant, or geyser to the world whenever and wherever you like.

Key Features
  • Create and Destroy Tiles: Dramatically alter the landscape of the asteroid by spawning or destroying any element of your choosing.
  • Spawn Duplicants: Create as big or as little of a population as you want. See how many Duplicants you can sustain in a single colony!
  • Save Compatibility: Enable sandbox mode in your existing save or start a new world. Note: You won't be able to reload your save in survival mode after it's been saved in Sandbox!

And More!
  • New Automation Control: The new Gaseous Element Sensor lets you detect the composition of your surrounding atmosphere. In-pipe sensors now let you control you colony based on the element, temperature, or germs contained within your pipes. A memory bit makes building your own super computer easy*!
    • More Logic Ports: Even more buildings are now toggleable with a logic input.
  • Radiant Pipes: First, there were pipes. Then, there were insulated pipes. Now... there are radiant pipes! Effectively move thermal energy into and out of your rooms with this high-conductivity plumbing.
  • 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 II Upgrade Preview, submitted your 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 II!

[HOTFIX] 269334 - 5/23/2018
  • Fixed an audio stuttering issue
  • Fixed ui icons for fabricator queues
  • Fixed a crash that could occur when dupes pickup a piece of ore on the same frame it was destroyed
  • Fixed an invalid temperature bug that could occur when a door melted

[HOTFIX] 267379 - 5/7/2018
  • Fixed a few crashes if a duplicant steps in water, breathes oxygen, or tries to idle near the edge of the world
  • Updated Chinese localization
  • Fix missing string in scale growth
  • Added tame tag to baby slickster
  • Fix missing Database icons
  • Improve Database load times
  • Added Database icons for liquid and gas categories
  • Improve memory used by some debug logging

[HOTFIX] 266962 - 5/4/2018
  • New grid layout for creature diets in database.
  • Fixed duplicate creature diet database listings.
  • New baby puft art.
  • Fertility modifier descriptions should now respect the player set temperature units.
  • Memory Toggle is now in the same layer as the logic gates.
  • Memory Toggle should now save load correctly.
  • Fixed symbol popping on baby floaters.
  • You can no longer build infinite Conveyor Bridges on top of each other.
  • Shearing station is now prioritizable.
  • Creature diet tooltip should no longer list 0kcal/cycle for all entries.
  • Unspoilable food should now appear as unspoilable in the database.
  • New fish relocator art.
  • Added some logging info to get more details about a crash that is occuring when using localized text input boxes.
  • Fixed a crash that could occur when using debug keys in the main menu.
  • Tropical pacu should no longr have an extra red tint applied.
  • Eggs in the incubator should now be in the proper layer.
  • Fixed a crash that could occur when a fish flopped outside of the world.
  • Few fish feeder art.
  • Fish eggs are no longer halfway through the ground.
  • Dreckos now grow scales more sloly when wild.
  • Gas element sensor should now have a gas icon instead of a liquid drop.[/live]
80 comments Read more

April 19

Ranching Upgrade Mark II Preview Is Here!

Hello friends!

It's the start of the third trimester for Ranching Upgrade Mark II. Through extensive breeding, Duplicants have begun observing strange eggs... could this be a new species variation? Or a whole new creature? In addition, they've just finally noticed how cute those freshly-hatched critters are!

Meanwhile, some industrious plumber Duplicant has been busy in the lab to bring us new pipes and sensors, and it's a good thing too, because there's more ports to plug those sensors into.

All this new automation has given the Duplicants a power complex, and they've decided to make the whole world their sandbox. Mind that temperature tool!

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 II preview:
  • New Critter Morphs -- by breeding creatures new kinds of eggs might be laid
    • Hatch Morphs
    • Shine Bug Morphs
    • Slickster Morphs
    • Puft Morphs
  • Baby critters added to the critter lifecycle
  • New critters:
    • Drecko
    • Drecko Morphs
    • Pacu
    • Pacu Morphs
  • Gaseous Element Sensor
  • In-pipe sensors (liquid and gas)
    • Germ sensor
    • Element sensor
    • Temperature sensor
  • Radiant pipes (liquid and gas)
  • Memory Bit logic component
  • Added logic ports to many more buildings
  • Sandbox Tools
    • Sandbox mode can be enabled on new custom games, or from the pause menu
Check the patch notes for the most up-to-date changes!

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! For more details on joining the preview branch, check out the official post.

[BETA PREVIEW HOTFIX] 264383 - 4/19/2018
  • Fix crash when pressing the "z" key
  • Baby critters will now call out occasionally
  • Creature's recent diet will properly load to become poop, no more mass loss
  • Cleaned up which creatures are listed in which feeders
  • Fix for missing scales in Drecko art
  • Basic Drecko is now a fibre producing critter, plastic Drecko is a Morph.
  • Updated Shine Bug egg and baby artwork
  • Tweaks to sub-priority selector

[BETA PREVIEW HOTFIX] 265004 - 4/19/2018
  • Tile hover text should now display correctly
  • Cursor should not longer get stuck looking like a hand
  • Sandbox UI should no longer appear offscreen
  • Possible fix for bottom right buttons not being clickable

[BETA PREVIEW HOTFIX] 265069 - 4/20/2018
  • Another potential fix for the bottom right buttons not being clickable
  • Tooltips on character select screen should now work
  • Baby creatures should no longer die of old age before they get a chance to grow up
  • Fixed a crash that could occur when cloning storage filter options
  • Fixed a crash that could occur when deconstructing switches
  • Pacus will slowly get tame from eating from the fish feeder

[BETA PREVIEW HOTFIX] 265092 - 4/20/2018
  • dupes should no longer sometimes appear to be invisible

[BETA PREVIEW HOTFIX] 265257 - 4/23/2018
  • Sleeping status item should no longer flicker on and off.
  • Sage Hatch babies should now turn into Sage Hatch adults.
  • Lightbug babies should now look like their parents.
  • Hatches should no longer disappear when laying an egg or being groomed.
  • Deconstructing the logic memory bit should no longer cause a crash.
  • Shearing station should now require power.
  • Dupes should no longer slide through doors.
  • Baby hatches should no longer try and burrow into the ground.
  • Loading a save file with dupes who are low on breath should no longer cause the dupes to be invisible.
  • Debug painting crushed rock should no longer cause a crash.

[BETA PREVIEW HOTFIX] 265438 - 4/24/2018
  • Potentially fixed the remaining issues with Duplicants turning invisible.
  • Pacus can no longer swim through two touching diagonal tiles.
  • Pacus can no longer swim through mesh tiles.
  • Pacus are slightly happy that they ate from a feeder.
  • Ore should no longer fall/disappear on conveyors.
  • Hat wearing Duplicant portraits should properly show their hat hair.
  • Fixed an issue where a significant amount of translated strings were not properly loaded.
  • Pipe overlays should render properly when using sandbox tools in an area covered by fog of war.
  • Stone hatch eggs should now spawn Stone Hatchlings instead of adults.
  • Layed eggs should now look like the creature that will hatch out of the egg instead of the creature that layed the egg.
  • Fixed some Light Bugs not hatching the correct babies.
  • Fixed Slicksters hatching as adults instead of babies.
  • Thermal conductivity for heat exchange is now based on the average conductivity of the two elements instead of the minimum. This should improve the temperature exhchange of many things including radiant pipes.

[BETA PREVIEW HOTFIX] 265550 - 4/24/2018
  • Fixed another case of dupes going invisible
  • Status items should work once again
  • Misc crash fixes

[BETA PREVIEW HOTFIX] 265646 - 4/25/2018
  • Fixed another case where dupes could become invisible
  • Adult pufts should no longer try and sleep
  • Insulated tiles/pipes use the minimum of their thermal conductivity and the
  • Elements they are transferring with
  • All eggs should now be selectable
  • Fixed a crash that could occur when painting toxic sand

[BETA PREVIEW HOTFIX] 265689 - 4/25/2018
  • Using a translation file with nested or mismatched "<link>" tags should no longer cause random crashes. Instead the english text will be used and the problematic strings will be listed in the log similar to strings using mismatched parameters.
  • When generating new worlds and when loading save files previous to this changelist, all Abyssalite will take on the temperature of their surrounding cells.

[BETA PREVIEW HOTFIX] 265724 - 4/25/2018
  • Fix for crash that could occur when loading/generating a world with abyssalite surrounded by vacuum.

[BETA PREVIEW HOTFIX] 265826 - 4/26/2018
  • Fixed a crash that could occur when using a translation that had unexpected <link> tags compared to the english version which could cause <link> tag nesting which is unsupported by Text Mesh Pro.
  • Doors should properly melt instead of providing free resources.
  • Fixed a crash that could occur when wearing a suit, a hat, an outfit, carrying a piece of ore and working at a building which had special effects as part of it's animation which would end up using too many texture atlases.

[BETA PREVIEW HOTFIX] 266019 - 4/27/2018
  • Fix Drip Cooling. In liquid density settling code we should've been calculating average temperature, not average energy which caused a rapid loss of energy.
  • Abyssalite should now ignore neutronium when averaging the temperature of nearby cells during world generation.
  • Fixed a bug where elements with zero thermal conductivity were conducting.
  • Fixed a crash that could occur when a helmet was destroyed.
  • Fixed the chewing sound on the adult hatch and added a chewing sound to the hatch babies.
  • Added some baby movement and inhale sounds to the Puft/Slickster.
  • Fixed a crash that could occur when the contents of a pipe froze as the pipe was destroyed.
  • Fixed an issue where the energy being passed from the conduit contents to the pipe was inverted.
  • Creature Lure should no longer crash on deconstruct.
  • Algae Habitats now have an empty chore which allows them to drop their bottles on the ground even if there is no bottle emptier.
  • Algae habitat no longer allows removal directly from storage.
  • Increased bottle emptier speed.
  • Fish eating from a storage locker notify the locker that it's contents have been changed so that the feeder gets properly refilled and things like the transfer arms can detect that it needs refilling.
  • Fish feeder should properly restore it's contents to the bottom of the feeder on load so that it's reachable by the fishes.
  • Baby hatches should no longer attempt to make jumps they can't reach.
  • Sandbox clear floor tool will not delete items in storage
  • Sandbox mode now has toggleable instant build mode.
  • Fixed a crash that could occur when using the 2147483646 world seed due to the Mono Random function crashing when using a value of int.Min.
  • Creature wrangling now respects priority. You can also see the priority toolbar if you click on the creature.
  • Thermal conductivity displayed on the properties panel for insulated/radiant buildings should now take into account those buildings modifiers.
  • Eggs spawned from tame creatures should now be tame.
  • Babies spawned from tame eggs should now be tame.
  • Adults spawned from tame babies should now be tame.
  • Duplicants can be spawned from the sandbox spawner menu.
  • Added official Russian translation(beta).

[BETA PREVIEW HOTFIX] 266094 - 4/27/2018
  • Scaled down the thermal conductivity multiplier of radiant pipes.
  • Fixed a bug where bottles being dropped by wash basins would get stuck in the air.

[BETA PREVIEW HOTFIX] 266340 - 5/1/2018
  • Pipe Empty jobs show the required role
  • Fix crash when trying to empty pipes
  • Sandbox "Instant Build Mode" defaults to checked
  • Fix incorrect temperature changes caused by partial boiling
  • Fix crash due to supercooling hydrogen
  • Show a notification if there is food available but dupes can't find any due to consumables permissions
  • Fix pop text when "cancelling" a non-wrangleable creature
  • Fix crash when computing cell visibility
  • Fix crash in sandbox brush tool
  • Fix crash that could occur when using debug keys
  • Shine Bugs now get groomed from the correct location
  • Pacu will properly overcrowd
  • Fix Drecko movement around corners
  • Fix crash when destroying POI ladders
  • Fix creatures not landing correctly after falling
  • Morbs once again trigger the trap
  • Updated Shearing Station animations
  • Updated Pacu animations
  • Fix Shine Bug egg UI art
  • Thermal conductivity is now a log-average instead of an average
  • Fix Shearing Station animation layering
  • Updated Pacu UI art
  • Critters now layer correctly when being ranched/sheared
  • Incubator shows egg icons for each variant now
  • Database entries for Critter Morphs should be linked correctly
  • Updated Slickster morph animations
  • Balance changes to Drecko diet
  • Drecko now requires Hydrogen atmosphere instead of chlorine
  • Glossy Drecko egg chances can now be improved by certain diets
  • Dreckos have an info item to show their shearable growth

[BETA PREVIEW HOTFIX] 266385- 5/1/2018
  • Adults should now copy all their attributes from their babies.
  • Selection is maintained when spawning egg > baby > adult.
  • Fixed crash if Pacu lands on floor.
  • Fixed layering issues when using the decor/farming overlays.

[BETA PREVIEW HOTFIX] 266516 - 5/2/2018
  • Fixed an issue where dupes would deliver liquids stored in liquid bottlers even if auto bottling was disabled after loading a save file.
  • Cleanup symbol override warnings in log files
  • Fixed a crash that could occur when entering world seeds in the custom game settings screen.
  • Codex subentry links will drive scrollview to the correct part of the codex entry.
  • Sandbox Destroy tool deletes POI objects.
  • Dreckos should only attempt to eat plants that have grown to at least 25% of maturity.
  • Dreckos now poop phosphorite.
  • Fixed a crash that could occur when the sim send messages back to the game.
  • Reduced some of the memory usage of the navigation system.
  • Fixed a crash that could occur when ore fell outside the world when using sandbox tools.

[BETA PREVIEW HOTFIX] 266562 - 5/2/2018
  • Fixed misc crashes that could occur when loading certain save files or generating certain worlds

[BETA PREVIEW HOTFIX] 266638 - 5/2/2018
  • Shine bug navigation should be fixed
  • Fixed a crash that could occur on load of certain save files
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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
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

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