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World Climate Lab
World Climate Lab is a real-time planetary climate simulator. Import your own terrain or sculpt a world in the topography editor, then watch a living climate emerge from physics: winds, oceans, cloud bands and ice. Every climate is calculated, not painted.

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Features
Single-player
Family Sharing
Profile Features Limited 
Languages:
Interface Full Audio Subtitles
English ✔ ✔

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“World Climate Lab has a solid, working foundation, but a planetary climate sandbox can grow in many directions, and the people who use it for their own worlds should shape the directions it takes. Releasing in Early Access lets the worldbuilding and simulation community directly influence which new planetary features, climate models, classification tools, and editor capabilities get built. Their feedback won't just find bugs; it will decide what the simulator becomes.”

Approximately how long will this game be in Early Access?

“We plan for an Early Access period of roughly six months, though this may be adjusted as we respond to community feedback and the scope of features players request.”

How is the full version planned to differ from the Early Access version?

“We plan to use the Early Access period primarily to refine and polish the simulator based on player feedback. This includes improving usability, smoothing rough edges in the interface and editor, fixing issues that emerge through varied use, and tuning the simulation and rendering for a wider range of hardware. Where the community identifies valuable additions, we would like to incorporate them, but our central goal is a more polished, stable, and refined experience rather than a fundamentally different one.”

What is the current state of the Early Access version?

“The Early Access version is fully playable and stable. You can build worlds or import your own terrain, run real-time physics-based climate simulations, terraform real planetary bodies, and explore climates across a wide range of rotation regimes, atmospheres, planet sizes, and star systems including binaries. The core simulation, topography editor, and planet rendering are all functional. Early Access will focus on expanding the breadth and depth of what can be simulated and created and to see if worldbuilder want to try our more experimental simulation layers that are not yet fully stable but that some might appreciate, guided by community feedback.”

Will the game be priced differently during and after Early Access?

“No. We plan to keep the price the same during and after Early Access.”

How are you planning on involving the Community in your development process?

“We plan to gather feedback through the Steam Community forums, and direct player suggestions, and to use that input to prioritise which worlds, features, and tools we develop next. The worldbuilding and simulation communities have deep, specific knowledge, and we want that expertise to shape the simulator's direction.”
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About This Game

World Climate Lab

World Climate Lab is a real-time planetary climate simulator. Build a world or bring your own, set its star, rotation, and atmosphere, then watch a complete climate system develop from physical first principles. Nothing here is hand-painted or faked. Winds, ocean currents, cloud bands, rainfall, and ice form because the physics says they must.

Bring your own world, or build one here

Import your own terrain and discover the climate it would truly have, or shape a world from scratch in the built-in topography editor. Raise mountain ranges, carve oceans, and position continents, then let the simulation reveal the winds, rains, and temperature your world produces. For worldbuilders, this is the answer to a question maps alone can never settle: what would the weather actually be?

Build a world, then watch it breathe

Adjust a planet's spin and watch its weather reorganise in real time. Slow a world's rotation and see its circulation widen into vast climate bands. Lock it to its star and watch a permanent storm ring form along the line between endless day and endless night. Thicken the atmosphere, move the oceans, change the sunlight, and the whole system responds.

Terraform real worlds

Take Venus from a crushing greenhouse to a temperate world with oceans and weather. Warm a frozen Mars until rivers run. World Climate Lab models real planetary bodies, so you can test what these worlds might become.

Explore climates beyond Earth

Earth's familiar climate zones are only one possibility. World Climate Lab introduces a complete classification system for worlds that don't behave like ours, including fast rotators, slow rotators, and tidally locked planets where the rules of weather change entirely.

Real science, made visible

Every world is calculated from genuine atmospheric and physical models, then rendered with a planet shader that derives its colours, oceans, and atmospheric glow from the simulation itself. What you see is the physics, made beautiful.

Whether you are a worldbuilder testing a map you have drawn, a student of climate and physics, or someone who simply wants to watch a world come alive, World Climate Lab turns planetary science into something you can hold in your hands and play with.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

The game's simulation, visuals, terrain, climate modelling, (Illustrations are hand-drawn and human-made), and rendering are produced entirely by physics-based and procedural systems, not generative AI. Generative AI was used only to assist in drafting some of the game's descriptive and informational text (such as in-game reference and classification descriptions). All such text was first written by the developer, with AI helping to correct it, and was then reviewed and edited by the developer.

System Requirements

    Minimum:
    • Requires a 64-bit processor and operating system
    • OS: OS Version: Windows 10 64-bit
    • Processor: Intel Core i5-6500 / AMD Ryzen 3 1200 or better
    • Memory: 8192 MB RAM
    • Graphics: Vulkan-compatible GPU with 2 GB VRAM, GTX 960 / RX 560 / Intel Iris Xe class or better
    • Storage: 1000 MB available space
    • Sound Card: N/A
    • Additional Notes: Requires a Vulkan-compatible graphics driver. Large exports, cinematic frame dumps, and generated maps may require additional disk space.
    Recommended:
    • Requires a 64-bit processor and operating system
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