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Universe Sandbox

Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.

Steam Page
Developer
Giant Army
Publisher
Giant Army
Release
August 24, 2015
10 years and 346 days ago
Steam Reviews
Overwhelmingly Positive31,830 reviews96.5%

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Updated: Jul 10, 2026Developer scaleThe operating scale of the game's developer.
Updated: Jul 14, 2026Publisher scaleThe operating scale of the game's publisher.
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Search Google: How is Universe Sandbox and Giant Army funded?FundingThe known source of funding behind the game.
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Updated: Jul 10, 2026Release statusWhether and how the game has been released.

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About the Game

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 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.

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.

And more...

  • 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

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