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Oxygen Not Included
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.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.
What reviewers agree on
79 of the 103 reviews raise this.
“Oh boy, Get your Google Sheets ready, you better learn how to make calculations. First of all, i will say that this is an amazing game, and everything i will be saying here is satirical in nature and meant to be funny.…”
“Weaponize your autism, working physics, pipes, ducts, power generating and wiring, automatization. Almost unlimited crafting potencial. If you dont like throughput of machinery, just build your own as part of map! works…”
“很好玩，才玩六十多个小时，就享受到了建造和研究的快了”
34 of the 103 reviews raise this.
“Oh boy, Get your Google Sheets ready, you better learn how to make calculations. First of all, i will say that this is an amazing game, and everything i will be saying here is satirical in nature and meant to be funny.…”
“Great game, and I lean away from colony builders but Oxygen Not Included has a relaxed mode that took a bit of the stress off so I could explore the systems without immediate punishment when making mistakes or not…”
“Have I made it off the main planet? No. Do I feel inclined to restart when my dupes pee in my water source? Yes. 10/10 colony building, resource management game. Lots to learn and lots of cool things to discover and…”
20 of the 103 reviews raise this.
“Here's what you do, get duplicants, find materials, kill duplicants, make a new world repeat. 10/10 highly recommend”
“At 1234 Hours, never having got past like the 3rd level of space. but ill will put another few thousand hours into this game. im obsessed. i play build my coloney and clear out and tidy my worlds. but i have all dlcs…”
“Before I actually bought this game, I saw one of my favorite youtubers play it, Blitz, and thought it was cool. That was about 5 years ago, and I completely forgot about this game until about the end of March when i…”
11 of the 103 reviews raise this.
“I really enjoy the strategiy, the graphics, the characters and the exploration aspect of the game as well.”
“It's awesome. Very deep, lot's to learn with tons of replay-ability. Neat aesthetic. One of my favorite games.”
“It’s honestly way more complex than it looks at first. The art style is cute, but the gameplay is pretty hardcore. You have to manage oxygen, food, temperature, and a lot of other systems that all depend on each other,…”
7 of the 103 reviews raise this.
“Oh boy, Get your Google Sheets ready, you better learn how to make calculations. First of all, i will say that this is an amazing game, and everything i will be saying here is satirical in nature and meant to be funny.…”
“Incredible game. Beautiful visually, had a great soundtrack and the sounds and emotions that come from Duplicants are brilliant to. This game is a work of art and a pleasure to play. Game and DLC's well worth the money…”
“200 hours in and I'm still having trouble consistently getting to mid game. Having heat kill my base at 100 cycles for the fifth time, now that's traumatizing. Best bang for my buck so far.”
16 of the 103 reviews raise this · 14 of them still recommend the game.
“My problem with Klei games in general is how they all tend towards having an ever-increasing demand/excitement curve with absolutely [i]no[/i] room for breaks. There is [i]always[/i] another fire to put out, and it's…”
“I...am not sure do I love this game or do I think it is utter trash. And that is what this game is. I watched game plays on YT, the amount of skill and knowledge of the game you need to do basic things is....ahm...huge.…”
“I honestly cannot say why I like this game so much. It stresses and infuriates me to no end, and I'm constantly putting out fires and micromanaging creatures whose sole purpose seems to be to discover and invent new…”
7 of the 103 reviews raise this · 5 of them still recommend the game.
“My problem with Klei games in general is how they all tend towards having an ever-increasing demand/excitement curve with absolutely [i]no[/i] room for breaks. There is [i]always[/i] another fire to put out, and it's…”
“I...am not sure do I love this game or do I think it is utter trash. And that is what this game is. I watched game plays on YT, the amount of skill and knowledge of the game you need to do basic things is....ahm...huge.…”
“I really like this game. But the constant managing of priority gets on my nerves. The colonists are so dumb. They just completely ignore every important build or dig order unless you set it to high priority. It feels…”
4 of the 103 reviews raise this · 4 of them still recommend the game.
“Don't believe in what the majority says, this game is NOT about buidling, or engeneering, or physics, or any type of management. No. This game is the mirror for your soul. It will test your honesty, integrity and…”
“I had a good time with this. It really is fun designing you base and trying new layouts to improve efficiency. Sadly, I just completely lost interest once I reached the late game. Exploring new areas just starts to feel…”
“look at my hours... obviously I like ONI. mid-game can be tedious. At end game I tend to play it like an idle game but you dont have to. Each new game has new challenges which is always fun”
3 of the 103 reviews raise this · 3 of them still recommend the game.
“Alright I still love the game but one thing I'm confused about is that one DLC (prehistoric planet) for some reason removes the ability for duplicants to make "masterwork" art. just why? like I'm trying to figure out…”
“Originally i hated this game. Then i got used to how it plays, and it became fun. Now it is more fun than any of my mainstream games. DLCs are a bit on the pricy side considering the base game price. But all and all a…”
“I have stockholm syndrome with this game. There just so many things to do, so many things to optimize, so many things to consider. First time session will be disaster, Second time session is stable, Third time session…”
Counted across 103 English reviews, sampled to match this game's 96.8% positive rating · as of 2026-05-20
“This game will have you pulling your hair out. Oxygen Not Included combines complicated systems that will have you learning thermodynamics at 2AM with funny looking squishy art. The thrill of finding an out of the box solution to something that has been giving you trouble for…”
— a player, Steam review · 388 hrs played“I love this game and I've still never reached the launching a rocket part. There's so much to do and so many different builds you can try. It's lots of fun if you like base builders”
— a player, Steam review · 564 hrs played“It's kinda interesting. Worth a try. The price per hour of gameplay cannot be beat :D”
— a player, Steam review · 1,730 hrs playedPlayer activity
Monthly average concurrent players. Live count fetched 2026-07-11 11:16 UTC · history via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
[Game Update] - 740622
Changes and ImprovementsThe Aquatic Planet PackMinnow's Freediver trait now provides +4 to all attributes while swimming.In new saves, Minnow will now join your colony with +4 in all attributes and th
[Game Update] - 737790
Changes and ImprovementsAll versionsRevised Tepidizer sound for when the building is in Turbo Mode.Aquatic critters will now reference pool size instead of room size in the Space Required section of t
[Game Update] - 737195
Fixes All versionsFixed crash opening Pacu Treat database entry.Spaced Out! onlyFixed excessive logging when loading a save on a non-start world.The Aquatic Planet PackDuplicants that start with the D
The Aquatic Planet Pack is Now Available + Update + Klei Fest 2026
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 lear
The Aquatic Planet Pack DLC launches next Thursday, June 11th!
Ahoy, friends! The Aquatic Planet Pack DLC launches next Thursday, June 11th! It'll be available on Steam, WeGame, and Epic. This is the splashiest DLC we've shipped to date: for the first time ever,
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-20.
| Genres | Indie, Simulation |
| Player tags | Colony Sim · Base-Building · Survival · Resource Management · Building · Singleplayer · Management · 2D · Simulation · Sandbox · Strategy · Space (SteamSpy community voting) |
| Features | Single-player · Steam Trading Cards · Family Sharing |
| Languages | English * , Simplified Chinese * , Korean * , Russian * * |
| Achievements | 50 |
| Estimated owners | 2,000,000 – 5,000,000 (SteamSpy) |
| Official site | https://www.kleientertainment.com/games/oxygen-not-included |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS: Windows 10 version 21H1 or later Processor: Dual Core 2 GHz Memory: 8 GB RAM Graphics: Intel HD 4600 (AMD or NVIDIA equivalent) DirectX: Version 11 Storage: 3 GB available space