Open now · By request
Oxytopia playtest
by iida-lab
A co-op colony sandbox where temperature and fluids run on a living cellular-automaton simulation. Terraform a dead world with friends, build a base that runs itself… then watch one leak bring it all down.
It's free to ask. The developer chooses who gets in.
- Access
- By request
- On playtest since
- Aug 4, 2026
- Planned release
- Coming soon
- Developer
- iida-lab
- Platforms
- Windows, macOS, Linux
- Players
- Co-op, LAN, Multiplayer, Online co-op, Single-player
- Languages
- English, Japanese
How to join the Oxytopia playtest
- Open the game's Steam page with the Request access button. Sign in to Steam if it asks.
- Request access to the Oxytopia playtest there. It's free and doesn't commit you to anything.
- The developer lets players in, often in batches, so it can take a while. Steam emails you when you're in, and the playtest appears in your library.
New to playtests? How Steam playtests work
How AI is used
I use generative AI tools in the development of OXYTOPIA. All AI output is directed, reviewed, and edited by me before it ships. What AI is used for: Branding art — the game's logo and app/store icons were designed with the help of AI models and are rendered in-engine as original vector/code artwork. Source code — parts of the game's code were written with AI coding assistants. At runtime: OXYTOPIA generates no content with AI while you play, and no player data is ever sent to any AI service during gameplay.
The developer's own words, from Steam.
About Oxytopia
OXYTOPIA is a 2D co-op colony sandbox — inspired by Oxygen Not Included and Factorio — built on a single idea: a world where every tile is a cell in a living simulation. Temperature and fluids aren't faked. They emerge from a cellular automaton that runs by the same rules, the same way, every time — for everyone in the game.
So gather some friends, terraform a dead world into a comfortable colony… and then cause a truly spectacular disaster.
A world simulated cell by cell
Every tile of the map is a cell. Gases and liquids flow, mix, pressurize, and settle between them; heat conducts through rock, pipe, and air; water freezes into ice, boils into steam, and melts down to magma — all from simple rules applied a million times over. Nothing is scripted, so the emergent behavior — the helpful and the catastrophic alike — is real.
Build, dig, and research
Carve into distinct biomes — from frozen crust to caustic depths to a magma core — mine and smelt ore, and climb a research tree that unlocks power, thermal control, pipe insulation, and advanced logistics. Every new tech is another tool for taming — or breaking — the simulation.
Real multiplayer, because it's deterministic
OXYTOPIA's simulation is fully deterministic — and that's exactly what makes seamless co-op possible. Host a world and build together today; a lightweight, multiplayer-only Linux dedicated-server command-line tool is planned, so your colony can keep humming even when you've logged off.
Cause a spectacular disaster
A colony this interconnected fails in interconnected ways. One overheated pipe, one mislabeled valve, one gas leak into the wrong room — and the very simulation that made the place livable turns it into a cautionary tale. Rebuild, and do it better. Or worse.
Content creators — you're free to film us
You are welcome to record, stream, and publish video of OXYTOPIA — including monetized videos and live streams — across the full game, the free demo, and any Early Access playtest build. No permission required. Just have fun, and please show us your best disasters.
From the game's Steam page.
