Mods / Simulations

• Sspace in realby tomcardassiou can play arowrd olso i used sadly a nother thing meow292 downloadsupdated 5 y ago
• BBinary Challengeby nikofbeanBinary moons orbiting binary planets orbiting binary stars.291 downloadsupdated 3 y ago
• TTerraformed Castor Gem Abby Chocice75Why do I keep terraforming stars?291 downloadsupdated 7 y ago
• DDetailed Realistic Uranusby 76561198880449275A realistic Uranus, made by me (Madplanetguy) Do not steal or repost this simulation or object, give credit if used elsewhere, thanks291 downloadsupdated 6 y ago
• 宇宇宙星系群by 桃花落满山前291 downloadsupdated 5 y ago
• YYoung Earth & Theiaby 76561199086250977Around 4 billion years ago, when Earth was young, a hypothetical Mars-sized planet slammed into Earth. This simulation does not simulate the Moon being formed.290 downloadsupdated 16 mo ago
• WWolf 359 star systemby 76561199093760867Wolf 359 is a red dwarf star located at a distance of approximately 7.9 light years from Earth, it has an apparent magnitude of 13.54 and can only be seen with a large telescope. Wolf 359 is one of the nearest stars to the Sun. it has 2 uncofirmed planet Wolf 359 b and c, Wolf 359 b is a gas gian...289 downloadsupdated 4 y ago
• EEarthish Teaby 76561198989889301289 downloadsupdated 5 y ago
• NNk-2020 [Smallest Star]by Dexter MorganI made this "Smallest Star" by editing Wolf 356289 downloadsupdated 7 y ago
• MMy Custom Solar System planets!by 76561198859655715These are planets with new textures! this did not take me to long.The Planets wich has a new texture are Mercury Venus Earth and Mars,Jupiter Uranus and Neptune and even pluto and Planet nine.i will make a dwarf planet one as well so yeah... Main planets are Neptune Jupiter and Uranus and Planet...288 downloadsupdated 6 y ago
• GGas Giant Packby 7656119843783989712 different gas giant colors! Red, Orange, Yellow, Green, Turquoise, Blue, Purple, Pink, White, Grey, Brown, and Black (you can't really see it). Feel free to use them wherever you like.288 downloadsupdated 8 y ago
• IInterstellar - Gargantuaby 76561198864092578this is real system in interstellar .but the planet is not same mass and edmunds that tell in story don't orbit the pulsar because the mass of gargantua are so great . and the habitable of pulsar are so big because if the pulsar orbit is so close ( but the star are not movng because the system is...288 downloadsupdated 6 y ago
• TThe Coruscant System (Star Wars Legends)by Bravecylinder(NOTE) This simulation Is for demonstrational purposes only. It Is not meant to be played. I used the Legends version of the System because It had much more information. The Coruscant system was a multi planet line of the most popular planets in the Galaxy, located in the "Corsca sector" of the G...288 downloadsupdated 7 y ago
• KKerbal Space Programby 76561199111638102@I recreated the solar system of Kerbal Space Program to Universe Sandbox, I hope you like it!287 downloadsupdated 6 y ago
• KKSP Outer Planets Modby 76561199203400160This is the KSP Outer Planets Mod pack where it just brings like 4 new planets and some moons and moves Eeloo. ----- Sarnus ¬ Gas Giant With rings Hale ¬ Asteroid moon in rings Ovok ¬ Egg Shaped Moon Eeloo ¬ Moved Dwarf planet Cratered moon Slate ¬ Lapetus Like moon Tekto ¬ Titan like moon -----...287 downloadsupdated 8 mo ago
• VVoscri Systemby Tinkersaint!Voscri is a B7V Star That Formed in The Same Nebula as The Sun, However Due To Its Mass It Has Long Since Turned Into a White Dwarf. Urnim: Earth Sized Planet in An Earth Like Orbit, Its Surface Is Scorched By Voscri and Its Atmosphere Has Long Since Been Stripped Away. Its Surface Sizzles at 518...286 downloadsupdated 8 y ago
• 三三体by 76561199066294770286 downloadsupdated 6 y ago
• AAlpha & Beta Leonium V1.1by 76561199564249564Welcome to Alpha & Beta Leonium star system! Alpha & Beta Leonium star system are composed out of F-type star and a brown dwarf, 13 planets, numerous moons (there are so many moons you could do a size comparison only out of this system) asteroids and dwarf planets! Also orbit colors have meaning,...286 downloadsupdated 15 mo ago
• Rroby 76561199379489604this is my first custom planet part 1286 downloadsupdated 4 y ago
• GGeocentrism Modelby nikofbeanIn astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth.[1] The geocentric model was...286 downloadsupdated 4 y ago
• MMy Realistic Jupiter (V4) (With 4000 Bands)by 76561198880449275@My realistic jupiter with 4000 bands. It uses a compilation of actual images provided by the ESA. Next version of jupiter will have a minimum of 10,000 bands. Do not steal this jupiter, and if you use it in a sim give credit, or your Steam sim could be removed, Thanks :)286 downloadsupdated 6 y ago
• UUltra Realistic Gas Giants Packby ByllGive Credits (:286 downloadsupdated 2 y ago
• EEvery hypothetical Planetby milltObject list: Sun-Vulcan-Mercury-Venus-Theia-Earth-Counter Earth-Mars Phaeton-Planet Five-Jupiter-Saturn-Uranus-Neptune-Planet X Planet O-Kupiercliff Planet-Planet Nine-Tyche-Nemesis285 downloadsupdated 8 y ago
• 블블랙홀-2021-01-23-142025by 76561199118161339284 downloadsupdated 6 y ago
• BBlue-Tinted Lunus and Purple Gas Giant Ustascionasciplby Chocice75That's one long title! This system is made of two objects requested by another user and a star: A regular planet which is tinted blue, a purple gas giant and just The Sun.284 downloadsupdated 7 y ago
• TThe Expanse Systemby 76561198402618764The solar system from the book series / amazon prime show 'The Expanse'284 downloadsupdated 7 y ago
• HHR 3186by 76561199442394074- 2 звезды - 6 планет - 13 спутников283 downloadsupdated 16 mo ago
• TTatooine STAR WARS™ Realistic Recreationby 76561198846769438Tatooine is a desert planet with very hot climate, 1% of the planet was covered in the surface water. The average humidity level was 5,4%. Regulary have from the ground where desert sands met cliffs and mesas. Was composed of a molten core with a rocky mantle and silicate rock crust. Geological f...283 downloadsupdated 4 y ago
• TThe Solandia Systemby 76561199372456729After Humanity fled earth they settled in this system282 downloadsupdated 4 y ago
• Ssmall exo-planet system orbiting the sun [what if]by Train Sim Playerthis is a fictional scenario.282 downloadsupdated 21 mo ago
• TTerraformed Solar Systemby 76561198880449275(UNFINISHED) Mostly Terraformed Solar System, there is still a lot of work to be done on this sim, but I hope you enjoy it! P.S. Please do not steal or repost this simulation or its objects, if you do use them elsewhere, give credit to the creator (Me) If you enjoy, drop a follow as I will make a...282 downloadsupdated 6 y ago
• SSolar systemby St Petersburgour solar system has planet, asteroid and dwarf planet planet closest to the sun the closest planet to the sun are mercury, venus, earth and mars the farthest planet in the solar system. the name of the farthest is jupiter saturn uranus neptune, eris and planet nine281 downloadsupdated 3 y ago
• AAtmosphere Packby 765611984378398979 different atmosphere colors! Red, Orange, Yellow, Green, Turquoise, Blue, Purple, Pink, and White. Feel free to use them wherever you like.281 downloadsupdated 8 y ago
• TTheiaby 76561198989630031Wellcome to theia281 downloadsupdated 5 y ago
• TTOI-5205 star systemby 76561199093760867TOI 5205 is red dwarf , not much is know about it due to it's distance from us, a candidate planet has been recently discovered, this gas giant orbits very close to its star. The gas giant color's have been inspired by this :280 downloadsupdated 4 y ago
• TThe Romky Systemby 76561198332161883An older system nearing the end of its main sequence Seven planets have been discovered around the star, with speculation of a third gas giant existing. There is still more to be discovered about this system. Notes: In-game temperatures are inaccurate. The temperatures in the description are corr...280 downloadsupdated 4 y ago
• Rrealistic super massive black holeby 76561199805248699this is my simulation of a realistic super massive black hole it took a long time to make because i hade to spend a long time in the bakrond settings and in the simulations view settings to make it as perfect as possible and just that you know if you move around a little but to much you see the p...280 downloadsupdated 4 mo ago
• BBlackhole Pulsarby Cranium9090I spawned a black hole and started messing with it and this happened :/279 downloadsupdated 7 y ago
• IIce Giant With Ringsby 76561198880449275An ice giant planet with rings in Universe Sandbox, Enjoy, and dont steal the simulation or its contents without giving credit, Thanks Also drop a follow if you like this item, i will make many more soon!279 downloadsupdated 6 y ago
• CColourable Crater Planet!by Chocice75Ever wanted a custom planet covered in craters? Well, now that exists! I did a bit of object modding to Mercury and this was the result. It's a colourable crater planet.278 downloadsupdated 7 y ago
• SSirius Systemby 76561198866428675"Sirius B" redirects here. For other uses of Sirius B, see Sirius B (disambiguation). For other uses of Sirius, see Sirius (disambiguation). Sirius A and B Sirius is located in 100x100Sirius The position of Sirius (circled). Observation data Epoch J2000.0 Equinox ICRS Constellation Canis Major Si...278 downloadsupdated 8 y ago
• UUniverseby 76561199140842033A custom made random Universe277 downloadsupdated 5 y ago
• PPeriodic Table Solar Systemby Neptunian GuyA System with a object based off every element on the perodic table, which took 8 videos to make! Check out my Channel below and subscribe if you havnt already to help me on the way to 40,000 subs :) Enjoy! -Neptunian Guy277 downloadsupdated 3 y ago
• SSolar wonderland 2.0by 76561199220845295Hey look! it's a new solar system276 downloadsupdated 2 y ago
• LLife on A Mileby 76561199548176692A "terraformed" asteroid 1 mile (1.6 km) wide.276 downloadsupdated 2 y ago
• IIntersteller Millers Planetby RMazerThis planet is almost totaly made out of water but looks very beautiful in the light! 91% water/ 9% land Temp: 11.0'C276 downloadsupdated 7 y ago
• BBlue Planet Packby 76561198880449275Everything here was made by me (MPG) Feel free to use any, just give credit276 downloadsupdated 6 y ago
• CChicxulub Impactby 7656119910662816266 million years ago, an asteroid called Chicxulub collided with the earth in the Yucatan Peninsula, in Mexico. The event was disastrous, since it created the extinction of the dinosaurs.276 downloadsupdated 4 y ago

2.2k simulations mods, most downloaded first. Each one has its own page here with what it needs to run and where its author publishes it; the files themselves stay with the author and are never re-hosted on this site.