![[Japanese Language Support] What Happens When Celestial Bodies Collide?](/imgs/p/JIxo87wJh5Y_xgjF1boGNUXVYNtu3dzb2tnY/62749.jpg)
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The physics sandbox game “Space Simulation Toolkit,” developed by indie game developer Pavel Kudinov, added Japanese language support in update v0.10.5.0, released on November 10 (Japan Time).
From Asteroid Collisions to Observing Artificial Life
This physics sandbox game allows players to adjust settings such as gravity and the properties of matter to observe the results of various experiments.
The game utilizes the GPU for its physics calculations, allowing players to verify various physical phenomena in real time—such as observing fragments scattering when celestial bodies collide or testing whether a shell can penetrate a tank’s armor. It also supports the Steam Workshop, enabling players to share their own creations.The armor penetration test is also a user-created item.
The game launched in Early Access for PC (Steam) in June 2020. As of this writing, it has received a total of 518 Steam reviews and has earned an “Overwhelmingly Positive” rating.
In June 2026, marking the sixth anniversary of its Early Access launch, the simulation “Biome” was added, allowing players to observe how seeds absorb water and sunlight to grow into plants. The latest update, released recently, adds support for a total of nine languages, including Japanese, along with ambient background music and a particle counter that displays the number of particles in the simulation.
"Space Simulation Toolkit" is currently available in Early Access for PC (Steam) and supports Japanese.
