Friends, grab your floaties...
...it's release day for The Aquatic Planet Pack!
This DLC features a plethora of pool-dwelling critters, flooded flora and submersible buildings...and Duplicants who learn to swim for the very first time in ONI history!
The Aquatic Planet Pack plunges colonies into the deep end of a marine world of kelp forests and coral reefs, where expanded aquatic ranches cater to cuisine and construction projects alike, and clams grow bigger than Duplicants. There are brand-new biomes, plants, resources, foods and buildings, plus two new recruits—including one who's unnaturally well-adapted to the environment. (And needs to be convinced to join you.) Don't miss the exclusive collection of cosmetic blueprints that helps colonies present a nautical facade, even if they haven't quite found their sea legs yet!
Explore underwater ecosystems that unleash new possibilities for power systems, and master the art of keeping your colony's head above water when dry land is as scarce as Duplicant brain cells. (It's okay, their crewmates know CPR.)
Whet your appetite for this wet new world with the new short here!
The Aquatic Planet Pack can be purchased for 9.99USD 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 Aquatic Planet Pack as well as past and future additions to the ONI universe. Special thanks to long-time modder Aki, with whom we collaborated on parts of this DLC!
The base game also gets a free update today! This includes flatulent Duplicants now producing bubbles when farting underwater, improved liquid visuals, 4k wires, and more.
What's in this DLC?
New starting world: Marinea!
Two new Duplicants: Kai and Minnow, the recruitable survivor Duplicant!
New biomes:
Beach
Reef
Kelp Forest
Abyss
[dynamiclink href="https://store.steampowered.com/app/4310080/Oxygen_Not_Included_The_Aquatic_Planet_Pack/"]
F.A.Q.
What platforms will this DLC be available on?
The Aquatic Planet Pack launches on Steam, WeGame, and Epic today (June 12th).
How much does it cost?
9.99USD
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 Aquatic 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.
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!
Our annual publisher sale is back!
Klei Fest is our annual celebration of all things Klei. https://store.steampowered.com/developer/klei/sale/kleifest2026
This year, we've got a ton of updates, discounts, and freebies for you.
To commemorate 20 years as a studio, we've made our very first game, Eets free for everybody, forever.
A free game update for Oxygen Not Included with new buildings, bug fixes, and QOL!
The Rotwood Powers-A-Plenty Update adds a new "Weapon Power" power type, QOL, and bug fixes.
The Release of Aquatic Planet Pack DLC for Oxygen Not Included.
The Lowest prices ever for many Klei Entertainment games
10 Years of Don't Starve Together - 90% off and a ton of Free exclusive Klei Fest Skins
A bunch of great bundles with additional discounts up to 50% off!
The Klei Shop has a big Klei Fest sale.
The conclusion of our DST Interactive Lore story arc
And DST Mobile is coming July, 21st!
We've also got more news from our published titles!
Rift of the NecroDancer OST Vol. 2 Music Pack is out now!
Beastieball has a new update, including workshop support and Portuguese localization
Fretless is now Steam Deck verified! Check out the new Accolades Trailer!
U.V.S. Nirmana has released a free bonus campaign update!
Check out more games published by Klei!
