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:
Overwhelmingly Positive (2,597) - 97% of the 2,597 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (19,970) - 93% of the 19,970 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 bit more in store for Oxygen Not Included, and we plan to exit early access some time in this year.”

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 1,500,000 players, 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 (48)

May 17

ONI Launch Date Moving to July

Originally posted by Bigfoot on the official forums

Hey folks,

Just wanted to give you all a quick status update:

We are going to delay the launch of Oxygen Not Included for a bit. After working on the final major update for the game we felt that we weren’t quite where we anticipated that we would be.

We’re feeling good about the content of this final update and we really think you will like what we have cooking but if we launch as scheduled, the update would not have seen much testing and it’s just not as polished as we (or you) would like.

Rather than launch something we’re not feeling great about, we’re just going to hold off a bit. We are moving release to July and we expect to open for testing around the end of June.

Our apologies for making you all wait a bit longer and once again, thanks for all your support!
232 comments Read more

April 16

Quality of Life Upgrade Mk III Available Now!

Hi friends!

Our final upgrade in the Quality of Life series has arrived… presenting: QoL Mk III! As always, we're extremely grateful for all the detailed feedback and intense support you’ve given us. We've got some big improvements for you this time:

First off, we've overhauled the Disease system. Overall, Duplicant sickness is simpler and more frequent, and can be successfully managed with adequate medicine infrastructure and doctoring time. Germs still work pretty much how you remember them, although Duplicants’ sickness has since been streamlined. Dupes no longer have an “immune system”, but instead simply have a chance to get sick each time they encounter germs of different types. Actually being sick is also a much simpler affair: Infected Duplicants will continue performing their duties in the colony, but the side effects from the disease will reduce their efficiency until cured.

Next, we've turned Jobs into Skills. Although we liked the "job" metaphor, it didn't really match the mechanics of the system, so we renamed it to "Skills" and tweaked many of the surrounding features to be more consistent with the idea of awarding new skills to your Duplicants. Morale Expectation is now accumulated per skill earned, so you’ll get to make a meaningful choice between how specialized or general a particular Dupe's skill set will be as your colony grows!

There have also been a bunch of fixes and additions to fill gaps and correct balance issues: The Steam Turbine has had an overhaul (it condenses the steam internally now!), there is a new Ice-E Fan which replaces the Hydro Fan (with an associated Ice Maker for producing ice!) and new structures for moving solid materials around both by Duplicant-power and with conveyor buildings. Additionally, we've added some new overlays, tweaked tool filters, and fixed a whole bunch of bugs and UI issues.

And with this Upgrade now in your hands, we're full steam ahead towards release! Further details can be found in our roadmap, but rest assured we're not done with this game yet, and will continue absorbing your feedback and making the best mad science experiment urine-powered rocket factory colony management game that we can!

What's New and Improved?

Major Disease rebalance
  • Sicknesses are more frequent but less deadly
  • Immune System removed, germs have direct chance to infect
  • New Medical skills and hats
  • New Sick Bay and Disease Clinic buildings
  • Medicine redesigned
  • Food Poisoning and Slime Lung tweaked
  • Allergies and Zombie Spore germs and sicknesses added
Jobs/Skills Overhaul
  • Jobs system is now the Skills system
  • Experience is now gained up front and then spent on Skills
  • Skills Screen (formerly Jobs Screen) displays acquired skills per-Dupe
  • Morale Expectation is cumulative per skill learned, rather than tiered
  • Freely assign a Duplicant's hat from all the hats they've earned
Major Building Changes
  • Steam Turbine total rebuild, it now condenses steam internally, and port and power behavior is much more consistent
  • New Sporechid flower appears in the Oil biome, and releases harmful germs
  • New Skill Scrubber building to reset skill points
  • New Ice Maker to create ice from water
  • Cooling Fan replaced with Ice-E Fan, the Dupe-powered method of cooling an area
  • New Conveyor Shutoff Valve
  • New Conveyor Chute
  • New Automatic Dispenser
  • New Material Overlay screen
New Integrated Mods System
  • Publish and download all mods from the Steam Workshop, or install locally in your Documents folder
  • Support DLL, worldgen, element, codex, and strings mods
  • Translations still supported, with no changes to existing mods necessary
  • In-game menu for enabling and reordering mods
For the full patch notes, please view the full update page!

HOTFIX - 326830
  • Swapped in the new artwork for the Early Access message screen
  • Mods can now overwrite all the remaining files in worldgen (biomes, features, subworlds, etc.)
  • Hooked up proper animations for the Automatic Dispenser
  • Fixed Duplicant scaling on the new game mode selection screen
  • Dupes printed from the portal (not starter dupes) come with 1 skill point
  • Tooltips on the skills screen should no longer go off the bottom of the screen
  • Deprecated buildings can no longer be copied
  • QOL2 saves which were upgraded to QOL3 will no longer show hearts on every skill
  • Door state is copied when copying settings between doors
  • Medical hat variants show correctly on the Skills screen
  • Logic timing should scale properly with game speed now
  • Skill Scrubber sounds added
  • Sneezing no longer interrupts errands, they will resume after the sneeze completes. (A few more emotes are underway to be fixed too!)
  • Duplicants who were in rockets in a QOL2 save will have their skill points properly upgraded. (If the colony has been loaded and saved in QOL3, the points can no longer be restored.)
  • Highly germ-susceptible Duplicants will no longer get other Duplicants sick when they are exposed to germs.
  • Selected hat displays correctly in the Skills screen
94 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
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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