• Prehistoric Planet Pack
  • Added a new Higby-themed monument top blueprint to the Supply Closet.

• All versions
  • Potential fix for a crash that can occur after deconstructing the Fish Release.
  • Fixed an issue where the shearable product of large critters sometimes spawned entombed inside of natural tiles instead of next to them.
• Spaced Out!
  • Restored radbolt cost display UI to fabricator recipe side screen.
• Prehistoric Planet Pack
  • Fixed an issue causing Rhex-themed monument top blueprint to sometimes display incorrectly.

• All versions
  • Updated Korean localizations.

• All versions
  • Fixed Critter Pick-Up and Critter Drop-Off displaying different critter counts in the same room.
  • Fixed an issue with Pips rummaging seeds from Storage Bins causing the seeds to float and be inaccessible.
  • Fixed buildings not displaying light rays correctly.
• Spaced Out! only
  • Fixed issue with Payload Opener and Supply Teleporter Output shipping liquids and gasses as bottles.
• Prehistoric Planet Pack
  • Fixed crash when destroying Demolior in the base game due to debris finding no place to spawn.

• All versions
  • Pokeshell molt pickupables now change their visuals depending on their mass.
  • Database search now also searches entry titles and categories for a match. All sub-entries of a matched title or category are also considered matched.
  • Database search speed optimizations.
  • Updated Chinese, Korean, and Russian localizations.
• The Prehistoric Planet Pack
  • Improved Demolior victory sequence sound and visuals.
  • Adjustments to Demolior damage feedback visuals.
  • Prehistoric asteroids will now try to avoid placing story traits in the Demolior impact zone.
  • Lumbs now periodically do a roar emote.
• Blueprints
  • The Prehistoric Massage Table and Inflatable Massage Table blueprints now share a new interact animation.

• All versions
  • Fixed a visual glitch in the Sandstone Biome Database icon.
  • Fixed a bug where an element chunk merging with another could cause the wrong animation size to show up.
• The Bionic Booster Pack
  • Fixed a bug preventing the Supply Teleporter and Payload Opener solid conduits from dispensing Gear Balm.
  • Fixed Flydos not requesting a new power bank when they're running low.
• The Prehistoric Planet Pack
  • Fixed an issue where Rhexes would only emote a limited number of times per play session.
  • Adjustments to Jawbo navigation to prevent accidental entombment and unexpected temperature damage.
  • Fixed an issue causing Jawbos to get stuck at the Fish Release.
  • Fixed a bug where critters dropping from a Critter Cargo Bay were not selectable until save load.
  • Fixed a bug causing the onset of Jawbo's hunger to be delayed, making them difficult to tame.

• The Prehistoric Planet Pack
  • Fixed an issue causing Dartles and their ranchers to get stuck after poorly timed farts.
  • Fixed a bug where critters dropping from a Critter Cargo Bay were not selectable until save load.

• All versions
  • The UI now shows Chinese localized DLC logo variants while playing on WeGame.
  • Updated localizations.
• The Bionic Booster Pack
  • Added an icon to the achievement banners for Bionic-specific achievements.
• The Prehistoric Planet Pack
  • Added Mimillet care package.
  • Reduced Peat Generator's minimum liquid output temperature.

• All versions
  • Fixed multiple Shine Bug eggs being delivered to the Incubator.
  • Converted Pokeshell and Oakshell molts to kg instead of units. This fixes baby molts (5kg) not being delivered to the Rock Crusher.
  • Molts are now listed as Organics instead of Industrial Ingredients in the Resources Screen, and Storage Bins.
  • Fixed a bug where window tiles built from Amber, Solid Resin or Solid Sap were not letting sunlight pass through.
  • Added "Biome" to the Sandstone Biome name to make it consistent with the other biomes whose names were recently updated.
  • The Jetpacks research tier is now called Projectiles to better reflect the technologies unlocked within.
• The Bionic Booster Pack
  • Fixed power bank dischargers requesting too many Atomic Power Banks.
  • Corrected placeholder Metal Power Bank recipe description text.
• The Prehistoric Planet Pack
  • Added the Grubgrub to the list of pollinators in the "Unpollinated" tooltip.
  • Post-impact space destinations in the base game now spawn closer to Relica.
  • Dartle's description no longer says that the critter eats Dewdrips right off the plant.
  • Intracosmic Blastshots can no longer be retrieved from the Meteor Blaster while they are in flight.
  • Ovagro Node Seed description now correctly says that it is the seed of an Ovagro Node.
  • Adjusted collider size of Feather Fiber.
  • Adjusted collider size of the Stereoscope keepsake.
  • The Demolior Debris description no longer mentions a "strangely familiar artifact." The item in question will be automatically delivered upon completion of the Blast Line of Defense achievement.

• Minor art revisions to Rhex and Lumb Atmo Suit helmets.
• Minor art revisions to Tear-Away Pants.
• Wardrobe:
  • Added clothing presets for seven Bionic Booster Pack outfits.
  • Added clothing presets for two Bionic Booster Pack atmo suit outfits.
  • Add a clothing preset for one Frosty Planet Pack atmo suit outfit.
• Added swampy atmo boots and crisp cadmium atmo suit to the Bionic Booster Pack collection.
• Added Supply Closet UI click SFX for Manual Generator, Plant Pulverizer and Monument skins.
• Fixed an issue where the Foot Massage Table disappeared after use.

• All versions
  • Fixed the Gas Range not consuming Natural Gas.
  • Oakshells once again drop 500kg of Oakshell Molt on death.
  • Fixed incorrect Pokeshell and Oakshell Molt production values shown in the database.

Hello friends, 

We're unleashing our new DLC today! Welcome to The Prehistoric Planet Pack. 

This DLC features an existential threat that no ONI colony has ever faced before: a massive impactor asteroid aimed right at this brave new world! 

The Prehistoric Planet Pack travels deep into the past, to a forgotten world ruled by ancient dino-like critters—some so big that their stomping will auto-harvest crops, others so prey-driven that they can't be trusted in a ranch. (Do they also have a taste for Duplicants? Only one way to find out.) There are brand-new biomes, plants, resources, foods and buildings, as well as two new recruits who've been stranded there for longer than they can remember. Plus, an exclusive collection of cosmetic blueprints that cultivate a truly paleontological palette.

Discover new long-range firepower to help your crew valiantly defend their new home, obliterate the incoming space rock before it hits, and change the course of history. In this universe, there's no such thing as safe... luckily, survival is in Duplicants' DNA! (Sort of.) For colonies that thrive on an amplified threat of mass extinction, there's an extra-explosive scenario available in the Lab. 

The Prehistoric Planet Pack can be purchased for 7.99USD and is available now on Steam, WeGame and Epic. 

If you own more than one DLC, shake things up by using the Scramble DLC tool when making a new game! It works for The Prehistoric Planet Pack as well as past and future additions to the ONI universe. 

The base game also gets a free update today! This includes a bunch of UI improvements, bug fixes, and critter tuning. 

What's in this DLC?

• New starting world: Relica

• Two new Duplicants: meet Maya and Higby!

• New biomes: A vine-filled Garden! A Jawbo-infested Wetlands biome! A Feather biome full of hungry Rhexes! 

• New critters: The mighty Rhex and Jawbo! The blissfully blank Lumb and Dartle! The winged Gnit and Mimika!

• New plants: Ovagro Vine, Mimika Bud, Snactus, Ring Rosebush, Sweatcorn Stalk, Megafrond, Dew Dripper, Seakomb, Lura Plant

• New buildings: a dino-meat Smoker, Peat Generator, Emulsifier, Fossil Block, Hanging Fossil Block

• New elements: Shale, Amber, Resin (the old version has been renamed Sap), Peat, Nickel, Biodiesel, Iridium

• New POIs: defense station ruins POI! Post-impact space destinations for base game! Post-impact space POIs for Spaced Out! Surface POI from the impactor asteroid's collision! 

• Exclusive prehistoric-themed cosmetic blueprints!

• ...and more!

Take a crash course in planetary defense and usher in the Age of Duplicants with The Prehistoric Planet Pack!

Our heartfelt appreciation to all those who helped us polish things up during beta! Check out the patch notes and F.A.Q. below.

F.A.Q.
What platforms will this DLC be available on? 
The Prehistoric Planet Pack launches on Steam, WeGame, and Epic today (June 12th). 

How much does it cost? 
7.99USD

Do I need to own the base game? 
Yes, you will need to own Oxygen Not Included in order to play this DLC content. 

Do I need to own Spaced Out! DLC in order to play this DLC content? 
You do not need Spaced Out to purchase or enjoy The Prehistoric Planet Pack .

How do I report bugs? 
Bug reports go here! Thank you so much for helping us squash 'em. 

How do I give feedback? 
We love feedback. Post it here.

Can I play with my old save game?
Yes, you can upgrade your old save. Please note that in DLCs that contain new worldgen and worldgen-related improvements, those aspects will be available to new games only. (For example, old saves will not contain the Demolior impactor asteroid.)

How do I upgrade my old save? 
Go to the pause menu and click on the DLC's logo. It will create a copy of the save with the DLC enabled.

Is there still a Previous Update Branch? 
Yes! If you're playing on the base game and this free update breaks some of your mods, you can opt in to the temporary, unsupported Previous Update Branch. 

Where can I find more details and information?
Check out our Steam Store page for more information! 

Full Patch Notes

Features

• The Prehistoric Planet Pack

  • Added new clusters

    • Relica (base game)

    • Relica Asteroid (Spaced Out! Classic style)

    • Relica Minor (Spaced Out!)

    • RelicAAAAAAAGHH (The Lab)

  • Scramble DLC settings

    • Added Relica Fragment in Asteroid Remixing.

    • Added new biomes in Biome Remixing.

    • In DLC Content mixing:

      • Added Prehistoric Ore Field starmap destination for base game players.

      • Added Amber Field Space POI for Spaced Out players.

      • Added care packages for new content.

  • Added new Duplicants

    • Maya

    • Higby

  • Added Garden starting biome

    • New Critters

      • Lumb

      • Mimika

    • New Plants

      • Ovagro Node & Vine

      • Mimika Bud

      • Snactus

      • Sweatcorn Stalk

      • Ring Rosebush

  • Added Feather biome

    • New Critters

      • Rhex

      • Dartle

    • New Plants

      • Dew Dripper

      • Megafrond

  • Added Wetlands biome

    • New Critters

      • Jawbo

      • Gnit

    • New Plants

      • Seakomb

      • Lura Plant

  • Added new foods and ingredients

    • Snac Fruit

    • Ovagro Fig

    • Tough Meat

    • Tender Brisket

    • Jawbo Fillet

    • Smoked Fish

    • Veggie Poppers

    • Toasted Mimillet

    • Sweatcorn

  • Added Demolior Impactor Asteroid imperative

    • Post-impact space POIs for Spaced Out! players.

    • Post-impact space destinations for base game players.

    • Demolior Impact adjustable difficulty setting for non-Lab Relica asteroids.

  • Add new buildings

    • Peat Generator

    • Two new sculpture buildings: Fossil Block and Hanging Fossil Block

    • Smoker

    • Emulsifier (not exclusive to DLC4)

      • Salt Water recipe

      • Biodiesel recipe

  • Add new elements

    • Amber

    • Resin (new, derived from Amber. The old version of resin has been renamed Sap.)

    • Peat

    • Nickel + Ore

    • Biodiesel

    • Iridium

    • Shale

  • New Points of Interest (POIs)

    • Prehistoric Planet Starting Base

    • Defense station ruins ruins

    • Surface POI when the impactor asteroid lands.

  • New Music

    • Added The Prehistoric Planet Pack-themed music track.

    • Added new prehistoric-themed music stingers: welcome message, morning & night, and Demolior falling.

  • Other new features

    • Added approximately 50 Prehistoric Planet Pack-exclusive cosmetic blueprints.

    • Added Cool Chlorine Gas Vent

    • Added Intracosmic Blastshot and Blastshot Maker recipe.

Changes and Improvements

• All versions

  • Buildings and Fabricators

    • It is now possible to substitute the ingredients of some recipes in the fabricator UI. Some recipes have been combined to take advantage of this.

    • Crafting Table and suit fabricators no longer hide recipes with undiscovered ingredients.

    • Moved liquid product recipes (such as Super Coolant and Visco-Gel) from the Molecular Forge to the Emulsifier.

    • The Plant Pulverizer recipe for Phyto Oil from Slime is now available in the base game.

    • Added late-tier research unlocks for Super Coolant and Visco-Gel recipes.

    • Added Peat to Refined Carbon recipe at the Kiln.

    • The Fish Release now requires submersion in liquid to accept deliveries.

    • Changed Meteor Blaster sidescreen to support ammunition selection and long-range target selection.

  • UX

    • The build tool can now place construction orders on top of wild plants, which will have the necessary uproot chores automatically generated.

    • When displaying Units, Rads or Calories values, precision displayed was increased. It now shows up to two decimal places.

    • Pollinated plants and fertilized plants now show a visual effect on them while the buff effect lasts.

    • The notification that pops up when the Research Portal has been accessed by a Duplicant now reads "Portal Unlocked!"

  • Care Packages

    • Added Dasha Saltvine seed to care packages.

    • Added Mealwood seed to care packages.

  • Elements

    • The new version of Resin (derived from Amber) can now be transformed into plastic at the Polymer Press.

    • Solid Resin is now a transparent material. Updated the visuals of Solid Resin to look more glossy.

    • Tallow now melts into Biodiesel instead of Crude Oil.

    • The Tallow description now mentions that it can be used for food or industrial processes.

    • The liquid harvested from Experiment 52B has been renamed Sap, and its solid counterpart has been renamed Isosap. They were previously called "Resin" and "Isoresin" respectively. (The name "Resin" now refers to the liquid produced by refining Amber.)

    • Added Peat as a substitute ingredient in the Kiln's Ceramic recipe.

    • Regolith from meteor showers only stacks 1 tile above the build limit.

    • Added new tile texture for Brine Ice.

  • Fuzzy Search

    • Database search now uses fuzzy matching.

    • The search function now considers the research tier when sorting results. For example, if two items both have the same maximum match on Name and SearchTerms, the more accessible (i.e. lower research tier) item will be listed first.

    • Improved the update speed from "No Results Found" when the search text is cleared, in Build Menu.

  • Worldgen

    • Changed the placement rules of entities in worldgen so that it is no longer possible to have two entities occupying the same cell. For example, Pincha Peppernut growing into a plant on the floor.

  • Critters

    • Large critters now have slightly more hit points than small creatures.

    • The Smooth Hatch diet has been updated to include Cinnabar and Nickel Ore.

    • Hatches can now eat Shale.

    • Critters will prioritize eating from a feeder over eating plant growth, regardless of distance.

  • Database

    • Added an Element Properties category to the database.

    • Changed the way Plastic Monomers are displayed in the database: The recipe for transforming Resin, Nectar or Petroleum into plastic is now displayed in the database entries for those elements.

    • Added a new Medicines category and entries to the database.

• Spaced Out! only

  • Rocket port buildings no longer exchange heat with the environment.

  • Revised the art of the four Radsick Monument Tops to make them slightly less grisly.

  • Spindly Grubfruit Plant database entry now contains an introductory paragraph of information about the plant.

  • Reduced Artifact Cargo Bay rocket burden.

  • Saturn Critter Trap

    • Can no longer eat 2x2 critters

    • Added a checkbox to the requirements section indicating critter consumption

    • Added edible critters to database entry

    • Added “Awaiting Prey” status item

• Frosty Planet Pack

  • The Plume Squash Plant database entry now displays an introductory paragraph of information about the plant.

  • Deep Fryer food now counts for "It's Not Raw" achievement.

• Bionic Booster Pack

  • Added a Tallow-based Gear Balm which provides high morale.

  • A Gear Balm’s element now matches its recipe ingredients.

  • Bionic Duplicants can now consume power banks at mess tables, potentially gaining a room bonus when doing so.

  • Bionic Duplicants will choose to breathe atmosphere rather than suffocate on a too-long journey to fetch an oxygen tank.

Fixes

• All versions

  • Another attempt at fixing unit vs mass fetch issues.

  • Solid conduits now transfer the whole pickupable if the mass per unit is greater than 20kgs.

  • Space Exposure hover tooltip is no longer shown for Airflow Tiles, Mesh Tiles, or doors which block space exposure.

  • Fixed an issue causing the Fish Release Counter to incorrectly count fish.

  • Reordered art skins so that Monument pieces appear top to bottom, and Canvas categories are grouped together.

  • Fixed a crash that happened when loading a save file that had a storage tile storing an old item that no longer exists in the game.

  • Added a database entry for “Filtration Medium” and corrected the links that led to it.

  • Farm and Power Control Stations output product temperatures now match input ingredients.

  • Fixed an issue causing Farm Stations and Power Control Stations to open work chores when they had insufficient material to produce anything.

  • Fixed an issue preventing the detail screen's title bar label from updating when the selected world cell's element changes.

  • Fixed Liquid Bottle Filler and Gas Canister Filler continuing to work when disabled.

  • Heat Resistant and Frost Resistant effect descriptions no longer imply that they will give Duplicants full immunity to extreme heat and cold, as they are still vulnerable to Scalding and Frostbite.

  • Fixed Payload Launcher sidescreen tooltips referring to the selected object as a rocket instead of a Payload Launcher.

  • Fixed Lead tile visual shine effects not working properly.

  • Added Cobalt tile texture.

  • Fixed large critters incorrectly being able to navigate down into a single cell space they can’t actually fit into.

  • Fixed an issue causing images in the database to sometimes have excessive whitespace appear above them.

  • Fixed missing rope in baby Hatchlings' trussed and escape animation states.

  • Fixed a bug where trapped critters could become unreachable creating impossible-to-complete errands which froze Duplicants.

  • Fixed Shine Bugs not consuming anything.

  • Fixed large critters interacting with the Critter Condo from the correct location.

  • Corrected and improved capture method descriptions for traps in their details panel.

  • Removed Small Pokeshell Molt and Small Oakshell Molt. The Pokeshell Spawn and Oakshell Spawn now drop small portions of regular Pokeshell Molt and Oakshell Molt on death or when maturing into adults.

  • Fixed a Rotpile crash that could occur when loading some saves.

  • Worldgen

    • Fixed a bug causing oil wells to sometimes spawn in neutronium

  • Performance

    • Further reduction in allocations.

    • Various improvements to Shine Bug performance.

    • Improved performance opening Vitals, Consumables, and Priorities screens.

• Spaced Out! only

  • It is now possible to set work priority values on Landed payloads.

  • Fixed Radbolt Engine not saving slider settings.

  • Fixed a bug where Loner trait on a Duplicant was not providing a boost on Piloting skill when that Duplicant was alone.

  • Fixed Drillcone mining rockets failing to mine on round trip flights to a Space POI in orbit of their origin asteroid.

  • Fixed the incorrect position of some objects when the starmap is opened.

• Frosty Planet Pack

  • Regal Bammoth Crest mass adjusted to match the mass of the Gold Amalgam yielded from passing it through the Rock Crusher.

  • Bonbon Trees now show a range of wood per cycle in the database to show how much wood per cycle you can produce when one or all of its branches are growing.

  • Fixed mass issue in a POI on Sweet Ceres Asteroid.

• Bionic Booster Pack

  • The progress of trying to reanimate a powerless Bionic Duplicant will no longer reset if the task is abandoned before it's completed.

  • Power Bank Dischargers will no longer generate heat when there is no power consumer drawing power from them.

  • The Lubrication Station's description now mentions Gear Oil as its input, rather than listing only Phyto Oil.

Modding

• Changed some Tunning static variables related to Duplicant Attributes to no longer be marked as "readonly" to facilitate modding on those.

• Added GlobalStringBuilderPool.

• GameplaySeason implements IHasDlcRestrictions.

• Renamed GameTags.StartingRefinedMetalOres to StartingRefinedMetals.

Changes since last public testing hotfix

Spoiler

• Added new lab asteroid RelicAAAAAAAGHH

• Fixed Rhex monument artwork..

• Added victory cinematic sound.

• Fixed Metal Rich and Metal Poor world traits not applying correctly to Nickel Ore

• Updated artwork for Demolior Debris, Liquid Demolior Debris, Molten Demolior Debris space destinations/space POIs

Klei Fest!

Our annual publisher sale is back! We've got a bunch of updates and discounts for you. 

• An free base game update for Oxygen Not Included including bug fixes, QOL changes, and a new building!

• The Release of The Prehistoric Planet Pack DLC for Oxygen Not Included

• The Lowest prices ever for many Klei Entertainment games

• Including the Klei Fest Bundle for an additional 40% off!

• Announcing Away Team - A new game set in the Oxygen Not Included Universe!

• Localization updates for Lab Rat

• Beastieball has a big new Milestone update including new team titles, new language support, new Beastie animations and more!

• Rift of the Necrodancer + Hatsune Miku DLC release. 6 songs + 1 free track!

Check out the sale page here: 

https://store.steampowered.com/sale/kleifest2025

We've also announced our new game - Away Team!

Away Team is a new Oxygen Not Included adventure. Take control of a duplicant and harness a new world where every tile is simulated.

Mistakenly shipped off on a research rocket, you find yourself in a strange new world where you must take control of the simulation to survive and thrive.

The world reacts to your every action. Harness chemical reactions, fine-grained temperature simulation and convection, liquids that evaporate, and more.

You will need to design and construct solutions to process, refine and build your way out of this ordeal in order to survive and complete your mission imperatives.

Oh, and maybe a little oxygen is included.

Check it out on Steam and Wishlist now!

 https://store.steampowered.com/app/2168390/Away_Team/

View full update

​

We've got dino-mite news: The Prehistoric Planet Pack DLC comes out this Thursday, June 12th! It'll be available on Steam, WeGame, and Epic. 

This DLC is a tribute to everyone who grew up wondering what it'd be like to coexist with dinosaurs... and whether or not they'd survive a dramatic encounter with an impactor asteroid! (It wasn't just us, right?)

Uncover an archaic starting world where cold-blooded Rhexes snack on smaller critters, heavy-footed Lumbs shake ripe crops right off their plants, and gigantic Jawbos lurk deep in fetid wetland pools. Lush fruit vines sprawl over walls and ceilings, while carnivorous flowers lure pesky Gnits to their doom... and produce valuable Amber. Elsewhere on the planetoid, strange plant buds deliver forth farm-supporting pollinator critters. 

Duplicants can lug oversized racks of sinewy dino meat over to the new smoker building to make enough mouth-watering brisket to feed all their friends. They'll need their energy, if they're going to build a surface defense station capable of blasting the impactor asteroid out of the sky before it hits! 

Plunge into this primordial planetoid now: Play the free beta version here today! The beta will be playable right up until the DLC goes on sale. Remember to back up your saves first. 

The Prehistoric Planet Pack will be out on Steam, WeGame, and Epic at the same time. It will cost 7.99USD.

For more info on The Prehistoric Planet Pack's content and features, check out our store page here.

https://store.steampowered.com/app/3655420/Oxygen_Not_Included_The_Prehistoric_Planet_Pack/

F.A.Q.
Which platforms will this DLC be available on? 
Steam, WeGame, and Epic. 

How much does it cost? 
7.99USD

Do I need to own the base game? 
Yes, you will need to own Oxygen Not Included in order to play this DLC content. 

Do I need to own Spaced Out! DLC in order to play this DLC content? 
No. 

Klei Fest Kicks Off June 12th!

Summer is nearly here, and that means the return of Klei Fest! We're gearing up for our annual celebration with big discounts and all kinds of exciting news, updates, and miscellaneous happenings across the Klei universe.

You can look forward to updates for Lab Rat, Beastieball, Oxygen Not Included, and Don't Starve Together. We're also releasing The Prehistoric Planet Pack DLC for Oxygen Not Included, as well as revealing a brand-new game!

If you haven't already, be sure to follow our Steam developer page so you don't miss a thing!

• Fixed Dehydrator producing incorrect liquid byproduct.

• All versions
  • Fixed a crash that sometimes occurred when a Water Cooler was destroyed while a Duplicant was seeking refreshment.
• Bionic Booster Pack
  • Fixed Flydo getting stuck while trying to pick up things it could not get positioned above.

• ​​​​​​​Fixed issue causing some symptoms of Slimelung to persist after the disease had been cured.