Create & destroy on an unimaginable scale... with a space simulator that merges real-time gravity, climate, collision, and material interactions to reveal the beauty of our universe and the fragility of our planet. Now includes VR support for Vive and Oculus Rift+Touch.
Recent Reviews:
Very Positive (89) - 88% of the 89 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (4,237) - 93% of the 4,237 user reviews for this game are positive.
Release Date:
Aug 24, 2015

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is 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?

“Universe Sandbox ² is in active development, but it's already a fully-featured, stable, and smooth-running space simulator. And it now officially supports VR with an HTC Vive or Oculus Rift+Touch.

We're proud of what we have to show, and we know many fans are eager to explore and experiment with the universe.

We're constantly working on features, improvements, and bug fixes, and we release frequent updates.”

Approximately how long will this game be in Early Access?

“It's hard to give an accurate estimate. Building a universe simulator is a job that's never complete.

We have a long list of features and improvements that we're very excited about implementing, and which will keep us busy for a long time to come.”

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

“Some of the features and improvements we'd like to add:
  • Space megastructures
  • Basic life simulation
  • More dynamic terraforming & improved climate simulation
  • Better collisions on a wider range of scales
  • Missions and objectives
  • Steam Workshop support
  • Achievements
  • Language localization
  • Improved human scale mode
  • More intuitive VR experience with features equal to desktop version

What is the current state of the Early Access version?

“Universe Sandbox ² has been in development for almost five years, and for the past two years, we've had users pouring hours into testing, exploring, and enjoying the sandbox. It is already a fully-featured, stable, and smooth-running simulator.

We've fixed most of the serious issues and have made a lot of progress on optimizations for a range of hardware. Because it is a large-scale sandbox, though, it does have its share of bugs and could use polish in some areas.

The VR version of Universe Sandbox ² is a more recent update, and we are working on adding more features and functionality to match the amount of control and fine-tuning that is possible in the desktop version.”

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

“The price will probably increase once Universe Sandbox ² leaves Early Access.”

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

“We actively seek community feedback from the in-game feedback as well as from our forums and social media.

Community feedback helps us prioritize our long list of planned features and focus on fixing the worst bugs and issues. We make an effort to address every issue that comes our way.

We also add simulations and features based on community requests, like the recent addition of custom-colored planets, and an index for the likelihood of life on planets. We also recently added a tool for easily recording and sharing GIFs on social media.

We are actively working on Steam Workshop support, which will open up doors to community-created simulations. Further down the line, we plan to also support sharing of custom models and textures.”
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Recent updates View all (46)

March 15

More Super Supernovae | Update 20.6

This is another small update, but we want to highlight how awesome our new supernovae look now. Thanks to our graphics developer, Georg, for all of his wizardry involved in making these look even cooler, all the while making them perform better, too.

This update also includes a number of smaller improvements, including improved trails in the Roadster sims.

Check out the full list of What’s New in Update 20.6

Now back to our work on lasers and Planet Grids for Update 21! Learn more about what we're working on for our next big update
22 comments Read more

March 7

They Put a Car in Space, We Upgraded Our Engine | Update 20.5

March 14: Update 20.5.2 is a small update that fixes a few bugs, including problems with volume settings and camera control.

Update 20.5 features:
  • A Tesla Roadster in Space
  • The Ultimate Engineered System
  • An Upgrade of Our Game Engine to Unity 2017.2
This is a small update in terms of content, but there have been some significant under-the-hood changes with the upgrade of our game engine to Unity 2017.2. As with past under-the-hood changes, it’s a sign we’ve transitioned well if you can’t see any differences.

But also: there’s a car in space! (And conversely, this car doesn’t even have an engine under its hood.) On February 6, 2018, SpaceX performed a successful test launch of their Falcon Heavy rocket, the most powerful rocket currently in use. The launch was intended as a demonstration of the Falcon Heavy’s ability to launch a payload into an orbit that could reach Mars. SpaceX also successfully landed two of the Falcon Heavy's reusable booster engines, although the central core crashed during its attempted landing.

As part of the test, the Falcon Heavy rocket carried a dummy payload to demonstrate that it could launch a large mass onto the required orbit. For this launch, SpaceX chose an unusual dummy payload: a Tesla Roadster electric car belonging to SpaceX and Tesla CEO Elon Musk. In a press statement released before the launch, SpaceX explained that it wanted a payload that was "fun and without irreplaceable sentimental value." While the Roadster will not land on or orbit Mars, its current elliptic orbit around the Sun will take it beyond the orbit of Mars at its farthest point.
Check out the Roadster sims in Universe Sandbox ²:
  • Home > Open > Tesla Roadster in Space
  • Home > Open > Where in Space is the Tesla Roadster

Update 20.5 also includes a database refresh for objects in our Solar System, a few other new sims (including the Ultimate Engineered System), improved supernova visuals, and a number of smaller improvements and bug fixes.

Check out the full list of What’s New in Update 20.5

We are making great progress on Update 21, but we unfortunately can’t provide a release date yet. Update 20.5 is just a step on the way to make sure everything is running smoothly. Thank you for your patience while we continue to work on Planet Grids and Lasers!

The Ultimate Engineered System, as described by astronomer Sean Raymond
45 comments Read more
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About This Game

Universe Sandbox ² is a physics-based space simulator that allows you to create, destroy, and interact on an unimaginable scale.

It merges real-time gravity, climate, collision, and material interactions to reveal the beauty of our universe and the fragility of our planet. Universe Sandbox ² is the long-awaited sequel to the original Universe Sandbox.

Universe Sandbox ² includes the desktop version and a VR mode with support for the HTC Vive & Oculus Rift+Touch. This is a free, automatic update.

Simulate Gravity

N-body simulation at almost any speed using Newtonian mechanics. Real science, real physics, no supercomputer required.

Collide Planets & Stars

Epic, mind blowing collisions of massive planetary bodies.

Model Earth's Climate

Watch sea ice grow and recede with the seasons because of the tilt of the Earth: change the tilt and change the seasons. Or move the Earth farther from the Sun and freeze the entire planet.
Learn more...

Terraform Planets

Add carbon dioxide to a planet's atmosphere to heat it up. Then add water...

Deform Surfaces

Impact planets with asteroids and comets and leave behind massive, molten craters.

Supernova a Star

Make a star evolve by cranking up its age or mass, then watch a supernova unfold.

And more...

  • Historical simulations - ride along with Juno, New Horizons, & other spacecraft
  • Material System - build planets out of Hydrogen, Iron, Rock, & Water
  • Solar flares & volatile trails
  • Procedurally generated stars & planets
  • Pulsars
  • Light-warping black holes
  • Dark matter

System Requirements

Mac OS X
SteamOS + Linux
    • OS: Windows Vista SP1+
    • Processor: 1.6GHz dual-core
    • Memory: 1 GB RAM
    • Graphics: 512 MB Video Memory, Shader Model 4.0
    • DirectX: Version 10
    • Storage: 2 GB available space
    • Processor: 2.6GHz quad-core
    • Memory: 4 GB RAM
    • Graphics: 1 GB Video Memory
    • DirectX: Version 10
    • Additional Notes: For VR, see recommendations from Vive or Oculus
    • OS: OS X 10.9+
    • Processor: 1.6GHz dual core
    • Memory: 1 GB RAM
    • Graphics: OpenGL, 512 MB Video Memory
    • Storage: 1 GB available space
    • OS: Ubuntu 12.04+, SteamOS+
    • Processor: 1.6GHz dual core
    • Memory: 1 GB RAM
    • Graphics: OpenGL, 512 MB Video Memory
    • Storage: 1 GB available space
    • Additional Notes: Officially supports the same Linux distributions supported by Unity (currently Ubuntu 12.04+). Other distributions can and will work, but they may require a bit of configuration and tinkering.
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