About the Game
You probably heard the theory that we live inside a computer simulation.
I wanted to create a big sandbox game in which you can create your own simulations, change the laws of physics, design mechanisms, create A-Life worlds and inhabit them with living beings, experiment with evolution and AI.
SST is a particle simulator that uses a graphics card as a supercomputer to calculate physics. The more powerful the graphics card, the greater the gameplay!
The building block of all worlds is an atom. Atoms can have links, thus producing spatial structures.
The physical properties of materials can vary over a wide range, allowing the simulation of gases, liquids, soft and solid bodies, various chemical processes and states of matter.
Perhaps even creating a virtual life!
For example, the “Protobiome” simulation is a living virtual world with light, water, earth, growing plants and dwelling creatures, guided by evolutionary genetics.
ATTENTION!
The game is in the deep Early Access state. It may be unstable. It may also completely fail to run on your system.
The game had initially been developed for NVIDIA cards. Therefore, the project works most optimally and efficiently on modern NVIDIA GPUs using CUDA. However, I'm willing to support the widest possible range of gaming systems. This is why the game also has an OpenCL port, so it can run on most AMD graphics cards as well.
It is really important that you have a recent version of the video driver installed. In case of problems running the game, first of all, please, try to update the video card driver!
I HIGHLY RECOMMEND to try the free demo version of the game before buying the Early Access version. This will let you make sure the game works well on your system!
Screenshots
16 images
Version Information
Update RequiredLatest on Steam
Build 21405012
Released Jan 07, 2026
Current Release
v0.7.1.9
Uploaded Mar 06, 2024
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System Requirements
How to Install
sst.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
96 MB
v0.7.1.9
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Download Space Simulation Toolkit for PC with a direct link or via torrent. Get the full version of Space Simulation Toolkit for free. Space Simulation Toolkit is a Indie released by Pavel Kudinov.