ModsSpace Simulation Toolkit
Space Simulation Toolkit mods
A mod changes the game itself. It needs something to load it, it may need other mods first, and it only works on the versions its author built it for.
549 mods, most downloaded first · newest update 18 Oct 2026
- SUBURB extordinareby 76561199482452611464 downloadsupdated 3 y ago
- realistic landscapeby 76561199482452611443 downloadsupdated 3 y ago
- mega-city-westby 76561199219667703mega city west from the game airframe ultra, not totaly to scale though.441 downloadsupdated 11 mo ago
- Castle_townby 76561199087680765credit to @noah for the base part of the town. just added more stuff like plus made the plastic/wood flammable. also yes some of the mineshaft is caveinable though it may need some assist to cave in. if your gpu can run it at higher speeds i recomend incressing the sim speed two 2 or 3 for better...433 downloadsupdated 14 d ago
- insta pompeii just add waterby 76561199482452611431 downloadsupdated 3 y ago
- Rain World Iterator remakeby 76561198995737173what if iterators were made in real life? this is my closest idea of that. this build includes realistic wiring, also pathways for humans. there are 2 main processing cores 1 is the main controller unit (or just CPU running a operating system) and the second one is a compute cluster containing bo...427 downloadsupdated 6 mo ago
- Custom Solar System 1.0by 76561199239312439Wow! An entire simulated system from a custom proto-planetary disk that ACTUALLY has results. Who would have guessed? Anyways, enjoy as the system evolves over time, or just mess around with them. (Collisions are awesome) INCLUDES: Molten cores! Moons! Asteroids! Minor planets! Functional stars!*...425 downloadsupdated 2 y ago
- compressed air engineby 76561199001211334If it stops just fill in more air (use particle spasing 0.25 when filling)422 downloadsupdated 12 mo ago
- Chemistry Equipmentby 76561198406127068we do a little trolling420 downloadsupdated 22 mo ago
- ring degradingby Blox2007 (the Last Fluorican)419 downloadsupdated 2 y ago
- Totally Accurate Submarineby 76561198951109419416 downloadsupdated 18 mo ago
- HEATby 76561198406127068Super realistic High-Explosive-Anti-Tank simulation that utilizes a conical shaped charge to blast a stream of copper through a carbon steel plate. *More about shaped charges from Wikipedia* -------------------------------------------------------------------------------- A shaped charge is an exp...397 downloadsupdated 22 mo ago
- Ho-1by O³Lightninggood gpu needed396 downloadsupdated 20 mo ago
- World Basicby 76561199046941783389 downloadsupdated 4 y ago
- Prototype Air/Smoke Engine V2 (1.2M)by 76561198437022811Non-self-sustaining. To use, rotate the wheel on the right. To refill, draw air in the tank at 0.5 cdist. Changes from V1 include a magnet, sun to uphase the air into a high cdist smoke, and improved valves. Still working on making it fully air-powered.378 downloadsupdated 3 y ago
- Working rocketAdd oil in one chamber and air in the other (0.25 spacing). The oil reacts with air to make fire and smoke.377 downloadsupdated 2 mo ago
- Neutron Star binaryby Blox2007 (the Last Fluorican)376 downloadsupdated 9 mo ago
- 3D Particlesby 765611983472892673D Formations with particle system!372 downloadsupdated 5 y ago
- T-64by 76561199659187376370 downloadsupdated 8 mo ago
- possibly functional plate tectonics testby Blox2007 (the Last Fluorican)probably might not work as im trying to make plate tectonics with sand, water, and lava and not the lava/stone method used by other people365 downloadsupdated 23 mo ago
- Spike viper settings universe simulationby 76561199014177620Thank you spike viper for making not only a great video but a great set of settings, this is a close recreation of them. okay that's all enjoy slamming asteroids into each other byebye365 downloadsupdated 3 y ago
- Human (Homo SST-sius)This is the realistic dummy to play with. !!! READ DESCRIPTION !!! IT CAN: 1. It is fully destructible! Shoot it, throw it, drop it, put it in a tank or rocket! 2. Somewhat thermoregulate - it keep own stable temperature. It will die if temperature is not in human's desired range (slightly relaxe...362 downloadsupdated 2 mo ago
- TIGER 2 (P)by 76561199772221331361 downloadsupdated 22 mo ago
- Spiral Galaxyby 76561198380243060A spiral galaxy made with the new rotate tool359 downloadsupdated 5 y ago
- You know the rules and so do Iby 76561198432886374359 downloadsupdated 5 y ago
- lan labs v2 (thanks jeff your the best)by 76561199482452611353 downloadsupdated 3 y ago
- Protoplanetary disk v2 with water (300k)by 76561198369567080the disk is also bigger Red=Rock White=Iron Blue=Water "I made v1 and v2 a few days ago, that's how they were released so close together" V1 =>350 downloadsupdated 4 y ago
- Armor N Shellsby 76561198337383925350 downloadsupdated 22 mo ago
- weird steam engine thingby 76561199127092173i made a video in which i used lasers to make a steam engine.333 downloadsupdated 3 y ago
- gas giantby Blox2007 (the Last Fluorican)321 downloadsupdated 3 y ago
- fontaineby kudinov.pavel317 downloadsupdated 5 y ago
- Tough tankby 76561199492570526315 downloadsupdated 22 mo ago
- 55 Custom Elements (outdated)by MaliceUPDATED VERSION: Explode, burn, melt, and freeze everything with 55 new elements to toy around with from variants of rock & ice to.... self-propellant fluid...?! This is the second upload, with six new elements and plenty of improvements to the other 49. New Elements: Jello, Jelly, Self-Propellan...299 downloadsupdated 11 mo ago
- Hollow Worldby 76561199186333629296 downloadsupdated 15 mo ago
- Massive Plantby bigulatorFormer biggest plant on the workshop, beaten by steam user Nikaxe.293 downloadsupdated 3 y ago
- Power unit 400K (THR)by 76561199287167095Please listen to a 3 min tutorial video above (IMPORTANT!!) The build is mine and idea too. The build contains easy to use: Thermal reactor Hydrogen batteries293 downloadsupdated 23 mo ago
- Iterator Remake V2 (ALT ACC PUBLISH)by 76561199871827769what if iterators were made in real life? V2 this is my closest idea of that. this build includes realistic wiring, also pathways for humans. there are 2 main processing cores 1 is the main controller unit (or just CPU running a operation system) and the second one is a compute cluster containing...282 downloadsupdated 5 mo ago
- Early Solar System (4800k?)by 76561198858862554A surprisingly realistic sim of an early solar system that's fun to watch develop over time. From messing around with it, I've seen planets with stable orbits, asteroid fields, planets with rings and moons after massive collisions, and even a planet that cooled enough to have liquid water on the...281 downloadsupdated 3 y ago
- Stone Halo (200k) v0_7_2_1by CloudZeroA planet with a ring of stone around it. Designed to support plant life. A fun map to test destruction.279 downloadsupdated 3 y ago
- Massive Planetary Impactby 76561199186333629279 downloadsupdated 15 mo ago
- under the sea in a baseby 76561199482452611278 downloadsupdated 3 y ago
- Engine Prototype V1by 76561199086840177A prototype engine design, only has crankshaft and piston (no valve timing) Simulation size is set to 300k (though engine probably only needs 25k)276 downloadsupdated 23 mo ago
- neutron starby Blox2007 (the Last Fluorican)275 downloadsupdated 3 y ago
- Radioactive Planet!by 76561199020093900For some, unknown reason, this planet emits radiation in the form of oil. There are two forms of radiation emitted; Particle radiation (OIL) and Fire Radiation. Mr. SST, please add radiation, like a green particle that goes fast and kills PLANT.274 downloadsupdated 15 mo ago
- PATIENCE (read description)by 76561198432886374If you wait for enough time, a beautiful pattern will emerge (NOT a galaxy or some other simple structure). You will need some PATIENCE for that :P Some tips: -The longer you wait, the clearer the pattern; -More friction (i.e. bigger "damp" property) means faster formation up to some point, but s...253 downloadsupdated 5 y ago
- iron disk collapse 2by Blox2007 (the Last Fluorican)245 downloadsupdated 3 y ago
- Jupiter and Europaby 76561198926876941244 downloadsupdated 4 y ago
- Terraby OculusImperatoris239 downloadsupdated 4 y ago
549 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.