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
Steam Patch Notes
Official update history
- Link rendering has been reverted to the old algorithm
- This should fix the FPS drop bug a few seconds after starting the game
- (the bug has been present since v0.10.0.0, i.e., since early summer).
image.node module not found - crash probably fixed without Windows reinstall
camera follow bug - fixed again
- Recovery mode on crash
- Active icons on tools menu
- one step only Undo in first version
- 1/2 of GPU memory reserved for Undo
- red mark for too big savefiles on Load
OpenCL UI inspect crash fixed, now UI more stable on AMD
GCN arch compatibility restored (RX 500, Vega), was broken last month
RDNA arch fixed (RX 6000,7000,9000)
still only 1/3 of normal FPS on RDNA (RX 6000,7000,9000)
so use smaller scenes starting 25K on newer AMD cards
also better nVidia performance in OpenCL mode
experimental Scene/Cosmos.tiesteps_lpow_x option multiplies both link integration frames per frame (Cosmos.tiesteps) and all material links strength on scene (Material.*.lpow,ldamp,sangle) but requires more GPU computation per frame (lower FPS and higher GPU calculations)
may be usefull for bridges, dambs etc.
note: ice, earth and other "soft" materials also becomes x times stronger
so, this option for scaling physics from "micro" to "macro" scale
- fps settings
- color picker update
- ui minor updates
- main menu user settings savefile
- icons updated
- slider fix
- scroll in book and load/save fix
- ASAP fix, several new UI bugs will be fixed later:
- drag&drop UI (Gravity,Magnet creation by click)
- scrolls (drag right side of the load/save menu for scroll)
- some layout issues
Current Release
Build 24099039
Uploaded Jul 26, 2026
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
126 MB
24099039
You May Also Like
View AllDownload 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.