SimVX

A Python game engine for 2D and 3D: scenes are plain Python, rendering is Vulkan, games export to the browser.

Pre-alpha. SimVX publishes development releases only (0.0.0.devN) and is under active development; the API changes between builds. Once stable versions ship to PyPI, development builds continue on pypi.simvx.com.

Install

You need Python 3.14+ and a GPU driver with Vulkan 1.2+.

pip install --pre simvx
pip install --pre simvx --extra-index-url https://pypi.simvx.com/   # or the latest development build

From source: git clone https://git.simvx.com/simvx/simvx.git && cd simvx && uv sync, then run commands through uv run (building from source).

Linux x86_64 is tested; Linux aarch64, Windows and macOS builds are untested. The install guide covers GPU drivers, platforms and glslc for your own shaders.

A first program

import math

from simvx.core import Camera3D, Material, Mesh, MeshInstance3D, Node
from simvx.graphics import App


class MyGame(Node):
    def on_ready(self):
        self.add_child(Camera3D(position=(0, 5, 10), look_at=(0, 0, 0)))
        self.cube = self.add_child(
            MeshInstance3D(mesh=Mesh.box(), material=Material(colour=(1.0, 0.2, 0.2, 1.0)))
        )

    def on_update(self, dt):
        self.cube.rotate((0, 1, 0), math.radians(90) * dt)


if __name__ == "__main__":
    App(title="My Game").run(MyGame())

Save it as my_game.py and run python my_game.py: a window opens with a red cube spinning. For the example library, pip install --pre "simvx[examples]", then simvx examples run demos_asteroids2d; simvx examples copy <id> --to <dir> copies one into a directory you own to start from. simvx editor opens the visual editor.

Features

• Scenes are Python files. Diff, review and test them like any other code; the editor reads and writes them as Python.
• One language, one toolchain. No scripting bridge: pdb, pytest and mypy work on your game.
• One API for 2D, 3D and UI. The visual editor and IDE are built on the same widgets you use.
• Browser export. simvx export web my_game.py writes a static WebGPU page.
• GPU-driven Vulkan renderer with PBR, shadows, SSAO, bloom and post-processing.
• Batteries included: physics, audio, animation, tilemaps, navigation and a headless test harness.

Links

Documentation · Examples gallery · Issues · Contributing · Changelog

Licence

The features, tutorials and demos examples are MIT; each port under examples/ports/ carries its own licence, the editor sample projects follow the engine's, and bundled third-party assets keep theirs (examples licence). Documentation prose is CC-BY-4.0 and its code snippets MIT (details). "SimVX" is a trademark. Contributions are accepted under the CLA. © 2026 Gabriel Bouffard.