Universe Sandbox is a realistic 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 includes the desktop version and a VR mode with support for the HTC Vive, Oculus Rift+Touch, and Windows Mixed Reality.
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 that leave behind molten craters.
Create Your Own Systems
Start with a star, then add a planet. Spruce it up with moons, rings, comets, or even a black hole.
Model Planetary Climate
Watch sea ice grow and recede with the seasons because of a planet’s tilt - change the tilt and change the seasons. Or move planets close to a star and see the oceans boil away as the surface heats up.
Learn more...
Supernova a Star
Watch a supernova unfold by colliding two stars, cranking up their mass, or making them explode at your whim.
Explore Historical Events
Hitch a ride with spacecraft including Juno and New Horizons, or view a total solar eclipse.
Throw Planets in VR
Just grab and fling.
And more...
Build and terraform planets with 12 materials, including water, oxygen, & carbon dioxide
Additional notes: For VR, see recommendations from your headset manufacturer
To activate the game, you need a Steam Account
Login or register at the official Steam Website and download Steam client
Install and start application, login with your Account name and Password
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process
After the successful code verification, go to the "MY GAMES" tab and start downloading.
News & Updates
2025-11-24
We Don’t Do Black Friday, We Do Better!
You want to get the best gaming price deals available on the market, right? Well, look no further than our ANTI-BLACK FRIDAY promotion then, as we got a storewide campaign that would blow you away not just for a single day or a weekend, but for a total of 5 whole days. That is far from everything though, just make an order of at least 20€ between 26.11.2025 12:00 CET and 01.12.2025 15:00 CET, and you will get a FREE game…
Tired of Fake Black Friday Discounts? Score Some Real Deals Instead
Amidst the craze that usually happens at the season of drop-down MEGA sales, we actually are not finding it hard to offer outstanding prices to our audience, as we do that on a pretty regular basis. Almost every year at the time for BLACK FRIDAY the prices around the market get slightly heightened and then reduced in a way to mimic major drops and discounts to the clients, but we do not favor such bad practice and this is why we decided to do something more different...
Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
Entering some text requires manually invoking the on-screen keyboard
This game requires manual configuration of graphics settings to perform well on Steam Deck