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
2026-06-26
Think You’ve Seen the Best Summer Deals? Think Again!
Summer is here and we are already preparing for a super fresh season full of incredible delights and heated moments! Make an order of over 15€ between 26.06.2026 11:00 CET and 29.06.2026 15:00 CET and you will get our special SUMMER DEALS GIFT, which will contain one of the following: discount codes - 10% OFF, 20% OFF, 25% OFF or 50% OFF; discount vouchers - 1€, 2€, 5 or 10€; or a FREE GAME…
The FIFA World Cup 2026 is coming in hot this summer and while these coming weeks it is all going to be centered around the best game in the world of sports, we decided to bring you a dedicated YUPLAY giveaway to commemorate the occasion together! This promotional giveaway campaign invites all of our followers to try and predict the exact final scores of selected matches from the World Cup…
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