- Casual
- Indie
- Simulation
- Early Access
Game
Universe Sandbox
Create and 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. Includes VR support for HTC Vive, Oculus Rift+Touch, and Windows Mixed Reality.
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.
About Universe Sandbox
- Released
- May 2008
- Developer
- Giant Army
- Engine
- Unity
- Platforms
- Linux · PC (Microsoft Windows) · Mac
Where to get it
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
From the developers
Official announcements, newest first. Posted on Steam.
- Community AnnouncementsWinds 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 WindsGases now sweep across planetary atmospheres by the newly simulated geostrophic wind. Check it out and customize the wind speed u...
- Community AnnouncementsBack to the Moon! | Update 36.1Artemis II MissionThe 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 Sandbox. Check out the original Earthset image captured by the Artemis II astronauts.Orion SpacecraftThe Orion Integrity spacecraft from...
- Community AnnouncementsPale 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 easily adding new physics features.“To me, it underscores our responsibility to deal more kindly with one another, and to pres...
- Community AnnouncementsUniverse Sandbox Roadmap: 2026 & BeyondOur first planned major release of 2026 is our physics architecture overhaul that will simulate meteors (atmospheric drag) and improve lasers. We’re also continuing development on life simulation, bringing Universe Sandbox to mobile devices, and other grand plans. But before we get into those projects, let’s look back at some highlights from last year. Work in Progress: Objects changing color b...
- Community AnnouncementsPale Blue DOTS Preview Now Available | Physics Simulation OverhaulFor the last four years, we’ve been working on a major overhaul of Universe Sandbox to utilize the Data-Oriented Technology Stack (DOTS) from Unity, the game engine we use to build Universe Sandbox, toImprove performance now and in the future.Add new physics simulation, like visually deformed objects and atmospheric drag to simulate meteors.Make our game code easier to maintain and build on.Pro...
- Community AnnouncementsNominate Universe Sandbox for the “Labor of Love” AwardEvery year, Steam gives the “Labor of Love” award to games that have been out for a while and continue to receive new content and support year after year. If you feel we are worthy, please nominate Universe Sandbox for the "Labor of Love" award!This year, we celebrated the 10-year anniversary of Universe Sandbox’s Early Access launch on Steam. We're proud of what we've accomplished in the last...
- Mods indexed
- 2.3k
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
of 74.5k on Steam Workshop
Most downloaded
Measured from the source's own counts, summed across every release.
- Nuclear War SimulationHere is a nuclear war simulation to see. Its December 12, 2045 The world has developed far more powerful nukes anyone could have imagined. These nukes are 10 times powerful than the Tsar Bomb. One nuke can take out large amounts of land. Who Will Win This War? If you want to make a planet with a...139.4k downloads
- Colliding Solar SystemsPretty self explanatory, two solar systems colliding.65.5k downloads
- The Elder Scrolls SystemIf you know any of The Elder Scrolls lore you might know that astrophysics are much different, if at all existant, in The Elder Scrolls Universe. This simulation is based on the image in the thumbnail. I take no credit for that image. Here is a link to the original:52.1k downloads
- Minecraft Solar SystemA representation of the Minecraft Solar system. All objects made by me (Madplanetguy) - dont steal them If you enjoy, drop a follow on Steam and visit me on Youtube as I will make a lot more planets! My YouTube My Discord48.9k downloads
- Martian Nuclear WarLooks like Aliens hate each other, SO I BRING YOU THE MARTIAN NUCLEAR WAR!48.8k downloads
- QUASAR - Active Galactic Nuclei GalaxyThis is a slightly faster version of a Quasar that was created previously. www.youtube.com/whatdamath43.1k downloads
- Supermassive Black HoleMy accurate representation of a supermassive Black Hole. This is not one object. All components made by me (Madplanetguy) If you enjoy, drop a follow as I will make a lot more things like this! My YouTube My Discord41.5k downloads
- Star Wars Galaxy and PlanetsThe full Star Wars galaxy with most of the main planets, I will be adding more but if there are any specifically you would like or there is anything wrong with the simulation , please feel free to leave a comment. Don't forget to rate if you enjoyed! The location, appearance, stats and dimentions...28.7k downloads
- Real ScienceYesh this is reel sience28.7k downloads
- Venus, EARTH, And Mars 2-3.8 Billion Years Ago.Decided to add the old version of earth since there's a pretty high demand in DMS and in the comment section. Enjoy. -BlueMarble27.5k downloads
- Terraformed Mars With Vegetation, Climate, Cities, and White Clouds.Been waiting to release this to a bigger audience so enjoy.23.6k downloads
- Halo - Reach [Epsilon Eridani System]Lore accurate simulation of the colony of Reach and adjacent planets orbiting Epsilon Eridani. Located 10.5LY from the solar system, with accurate planetary characteristics to information given within the lore on the wiki.23.5k downloads
- Mutsuni - The Most Beautiful PlanetThis planet may look like any other normal planet in the dark, but when the light comes up, the atmopshere shines up in diffrent shades of blue and green. If you use this planet in you own creations, dont forget to credit me! -Santi RP22.2k downloads
- Galactis - The Star Bigger Than 1.6 Million Milky WaysGalactis is a hand built star, looming over everything else with its unreasonable size of over 1,672,692 Milky Ways! Galactis comes with a Milky way and Sun to scale, if you can even find them! Have fun! -Santi RP20.4k downloads
- My Sun is a Pumpkin!There's a pumpkin at the center of our Solar System! The Gourd System? Q: Why did the sun go to school? A: To get brighter! I stayed up all night wondering where the sun went, but then it dawned on.20.0k downloads
- J1407 star system1SWASP J140747.93−394542.6 (also known as J1407 and Mamajek's Object) is a star similar to the Sun in the constellation Centaurus at a distance of about 434 light-years from Earth. A relatively young star, its age is estimated to be 16 million years, and its mass is about 90% that of the Sun. The...19.6k downloads
- Interstellar's star system.A faithful reconstruction of the planetary system shown in the movie "Interstellar".19.2k downloads
- Hole of blacknessThis black hole has jets.18.4k downloads
- The ISS ModelModel of the International Space Station (ISS) -not to scale All components made by me (Madplanetguy) Give it an upvote on steam if you enjoy, as it will help more people find this item! My YouTube Join My Discord Server <Here to chat with me or the community!16.1k downloads
- Universe size comparisonNote: The stars have darker colors to make them more visible.15.8k downloads
- Pandora From AvatarPandora Alpha Centarui A system15.3k downloads
- 100% Life likelihoodA planet; Hiora, has 100% life. Pls like. I spent months on it.14.9k downloads
- Earth's Nuclear WarAfter long droughts, famine, and drop of population, the United States has issued a single day that is never to return again, where every single president can fire missiles at each other without breaking the short peace treaty the UN made. (THIS IS NOT THE PURGE) Who will win this fight? Will hum...14.9k downloads
- Terraformed Solar System (FINALE!)THIS SIM DOESN'T WORK WITH SURFACE GRIDS. FOR THE FULL EXPERIENCE, CHANGE YOUR VERSION TO PRE-SURFACE GRIDS. This Is the FINALE to the whole Shabam. I know that sounds cringy but hear me out, It has taken me over 2 months to finish making this because I didn't know what to put in, but I hope this...14.0k downloads
Browse all 2.3k Universe Sandbox mods Sortable by downloads, rating and date.
More early access games see all
Why Universe Sandbox mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Universe Sandbox mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.