Space Simulation Toolkit
2D physics sandbox for building and experimenting with particle worlds
Pavel Kudinov · Released Jun 5, 2020 · Early Access
- Reviews
- Very Positive
- 81% of 531
- Recent reviews
- Very Positive
- 90% of 10 in 30 days
- Playing now
- 10
- peak 24h 12
- Steam Deck
- Unsupported
- Last update
- 1 month ago
- Aug 3, 2026
Free demo available, 5 playing it now: get the demo.
What is Space Simulation Toolkit?
In this 2D physics sandbox, you connect atoms into structures and adjust material properties to simulate gases, liquids, and solids. You can also experiment with Protobiome, a virtual ecosystem with plants, creatures, and evolutionary genetics.
For you if...
- +you like experimenting with physics in an open-ended sandbox
- +you enjoy building structures and simulating different materials
- +you want to tinker with virtual ecosystems and evolution
Not for you if...
- −you want clearly defined goals instead of sandbox experiments
- −you prefer systems that are easy to learn
What players say
81% of 531 reviews are positive · 90% of 10 in the last 30 days
Players praise the physics sandbox and its room for experimentation. They frequently report crashes and trouble running it on AMD GPUs; some also find it difficult to learn without a tutorial.
Screenshots and trailer
Space Simulation Toolkit system requirements
As published by the developer.
Minimum
- OS
- Windows 7
- Processor
- Core i3
- Graphics
- NVIDIA/AMD with OpenCL 1.2 support, 1+ GB VRAM
- Memory
- 2 GB RAM
- Storage
- 1 GB available space
- Notes
- NOT ALL GPU SUPPORTED! CHECK DEMO FIRST
Recommended
- OS
- Windows 10
- Processor
- Core i5
- Graphics
- NVIDIA GPU with CUDA support, 4+ GB VRAM
- Memory
- 4 GB RAM
- Storage
- 1 GB available space
- Notes
- NOT ALL GPU SUPPORTED! CHECK DEMO FIRST
PC version details
DRM, required accounts, controller support and Steam features.
- DRM
- None declared on Steam
- Controller
- Keyboard and mouse
- Platforms
- Windows
- Steam features
- Workshop, Family Sharing
Steam Deck: Unsupported
- Not supported on SteamOS
Tags
- Simulation
- Sandbox
- Physics
- Early Access
- Indie
- Artificial Intelligence
- 2D
- Space
- Space Sim
- Education
- 2D Platformer
- Exploration
- 1980s
- Roguelite
- Free to Play
- Building
Recent updates
- Aug 3, 2026 · v0.10.1.0 - Drawing Tools update
- Aug 2, 2026 · v0.10.0.9 - FPS Increase, Crash Fixes
- Jul 8, 2026 · v0.10.0.5 - FPS dropdown bug fixed
- Jun 16, 2026 · 🍀🏁🎉v0.10.0.3 - ancient "image.node" crash probably fixed
- Mar 2, 2026 · SST v0.9.4.2 - Undo, Recovery Mode, Active tools icons
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