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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.
N-body simulation at almost any speed using Newtonian mechanics. Real science, real physics, no supercomputer required.
Epic, mind blowing collisions of massive planetary bodies that leave behind molten craters.
Start with a star, then add a planet. Spruce it up with moons, rings, comets, or even a black hole.
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.
Watch a supernova unfold by colliding two stars, cranking up their mass, or making them explode at your whim.
Hitch a ride with spacecraft including Juno and New Horizons, or view a total solar eclipse.
Build and terraform planets with 12 materials, including water, oxygen, & carbon dioxide
Stellar flares & volatile trails
Procedurally generated planets, stars, & galaxies
Pulsars
Light-warping black holes
Epic space lasers
Shape oceans & mountains on planet surfaces
Spin planets apart with centrifugal force
Original soundtrack by Macoubre
Support for 20+ languages
Share & explore simulations on Steam Workshop
it actually is very important to know the Schwarzschild Radius of a baseball
funny and really realistic game for universe lovers!
Best Space/sandbox game next to space flight sim, would recommend
Wonderful, nostalgic, and surprisingly accurate. Universe Sandbox is a fun game, but I seriously got to stop turning the Earth into a supermassive blackhole.
it was laggy at first but after setting a lot of setting to low it ran so well i think this is my new space game :)
I would like it but it keeps crashing every time I try to go play universe sandbox
2 months ago
Winds of Change | Update 36.2Watch winds spread gases across planetary atmospheres, see the unique shape of any selected object with new stylized outlines, and adjust object compositions by percentage. We’ve also focused on eliminating issues with over 50 fixes and improvements. Atmospheric Winds G
4 months ago
Back to the Moon! | Update 36.1Artemis II Mission The recent Artemis II mission swept around the far side of the Moon, taking humanity farther than they’ve ever been from Earth. Experience it yourself in our new simulation, Artemis II: Humanity's Farthest Journey . Earthset created in Universe Sandbo
5 months ago
Pale Blue DOTS | Update 36Blast apart rings with lasers, deform moons as they become tidally locked, vaporize meteors, and more! We’ve reconstructed the physics simulation architecture of Universe Sandbox to provide a new base for improving performance, finding and fixing issues faster, and more
Universe Sandbox - PC (Steam)
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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. Simulate GravityN-body simulation at almost any speed using Newtonian mechanics. Real science, real physics, no supercomputer required. Collide Planets & StarsEpic, mind blowing collisions...
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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.
N-body simulation at almost any speed using Newtonian mechanics. Real science, real physics, no supercomputer required.
Epic, mind blowing collisions of massive planetary bodies that leave behind molten craters.
Start with a star, then add a planet. Spruce it up with moons, rings, comets, or even a black hole.
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.
Watch a supernova unfold by colliding two stars, cranking up their mass, or making them explode at your whim.
Hitch a ride with spacecraft including Juno and New Horizons, or view a total solar eclipse.
Build and terraform planets with 12 materials, including water, oxygen, & carbon dioxide
Stellar flares & volatile trails
Procedurally generated planets, stars, & galaxies
Pulsars
Light-warping black holes
Epic space lasers
Shape oceans & mountains on planet surfaces
Spin planets apart with centrifugal force
Original soundtrack by Macoubre
Support for 20+ languages
Share & explore simulations on Steam Workshop
2 months ago
Watch winds spread gases across planetary atmospheres, see the unique shape of any selected object with new stylized outlines, and adjust object compositions by percentage. We’ve also focused on eliminating issues with over 50 fixes and improvements. Atmospheric Winds G
4 months ago
Artemis II Mission The recent Artemis II mission swept around the far side of the Moon, taking humanity farther than they’ve ever been from Earth. Experience it yourself in our new simulation, Artemis II: Humanity's Farthest Journey . Earthset created in Universe Sandbo
5 months ago
Blast apart rings with lasers, deform moons as they become tidally locked, vaporize meteors, and more! We’ve reconstructed the physics simulation architecture of Universe Sandbox to provide a new base for improving performance, finding and fixing issues faster, and more
👍 Recommended · Steam player · 9 Jul 2026
it actually is very important to know the Schwarzschild Radius of a baseball
7 found this helpful
👍 Recommended · Steam player · 15 Jul 2026
Best Space/sandbox game next to space flight sim, would recommend
3 found this helpful
👍 Recommended · Steam player · 1 Jul 2026
Wonderful, nostalgic, and surprisingly accurate. Universe Sandbox is a fun game, but I seriously got to stop turning the Earth into a supermassive blackhole.
3 found this helpful
👍 Recommended · Steam player · 26 Jul 2026
funny and really realistic game for universe lovers!
0 found this helpful
👍 Recommended · Steam player · 25 Jul 2026
it was laggy at first but after setting a lot of setting to low it ran so well i think this is my new space game :)
0 found this helpful
👍 Recommended · Steam player · 22 Jul 2026
I would like it but it keeps crashing every time I try to go play universe sandbox
0 found this helpful
Activation country
Ukraine
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English
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