Oxygen Not Included 2 is a popular search because Klei's colony engineering sim still feels like it could support another decade of ideas. But as of June 15, 2026, players should be careful: there is no clear official Oxygen Not Included 2 announcement to treat as a release plan. What exists is a beloved original game, multiple DLC-era expansions and updates, and a community that naturally wants to know what comes next.
That makes the honest answer slightly boring but useful. If you are looking for a confirmed ONI 2 release date, there is not one to rely on. If you are asking whether a sequel would make sense, the answer is yes, but it would need to justify itself against a very deep first game.
What exists right now
Oxygen Not Included released in 2019 after early access and later grew through major content such as Spaced Out and later planet packs. The game remains the reference point for engineering-heavy colony sims because it makes air, heat, plumbing, power, food, morale, and waste behave like connected systems.
Why players want ONI 2
- A cleaner onboarding path for new players without flattening the simulation.
- A larger late game with more reasons to build elegant automated systems.
- Better performance and readability for huge colonies.
- More planet, rocket, and expedition structure.
- More ways for duplicants to feel personally important without turning the game into RimWorld.
What to watch instead of rumors
| Signal | Why it matters |
|---|---|
| Steam news posts for Oxygen Not Included | Official patches, DLC announcements, and update notes appear there. |
| Klei's games page | A real sequel or new project should eventually appear in official product listings. |
| Klei forum announcements | Good for developer communication and community clarification. |
| Store pages with release windows | More reliable than speculation posts or scraped database entries. |
| Developer wording | A sequel, spin-off, DLC, and spiritual successor are different products. |
What an ONI 2 announcement would probably need
A real sequel announcement would need more than a name. Players would look for a store page, platform list, trailer, Klei developer post, and a clear explanation of what changes from the original. The big question would be whether ONI 2 is a cleaner rebuild of the same survival-engineering loop, a broader space-colony game, or a more character-driven colony sim using ONI's systems language.
Until that exists, the best SEO answer is not to chase rumors. It is to explain the current state, point to official feeds, and help readers decide whether they should wait, replay ONI, buy DLC, or try an adjacent colony sim.
| ONI strength | Why a sequel cannot lose it |
|---|---|
| Physical simulation | Gases, liquids, heat, and pressure make every base feel like a machine. |
| Legible failure | Players can usually trace collapse back to a design mistake. |
| Automation | Sensors, logic, and machines create long-term mastery. |
| Duplicant charm | The workers make the engineering problem emotionally readable. |
| Layered progression | Food, oxygen, power, heat, space, and rockets all create new phases. |
Oxygen Not Included does not need a sequel because it ran out of ideas. A sequel would need to prove it has a better container for them.
The current answer is: Oxygen Not Included 2 is not something to plan purchases around today. It is a useful search phrase for tracking Klei's future, but the confirmed game you can play is still Oxygen Not Included, and it remains one of the strongest colony sims ever made.