A real-time liminal Quake/Hammer-style CSG level editor and game engine

• For rapid block-out, logic wiring, and gameplay testing.
• Designed to bring back the immediacy of classic Radiant/Worldcraft workflows.

Download binaries for macOS and Windows | Wiki Quickguide

Linux: use the included Dockerfile or compile and run from source

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Core Workflow

• Build a level, hit play, and walk around instantly
• No compile or lightmap baking
• Classic brush-based editing

Logic & Gameplay

• Entity I/O system (Half-Life 2–style)
• Visual scripting (25 examples)
• NPCs/monsters (WIP)

Rendering

• Real-time lighting with stencil shadows
• Unified forward renderer
• Fog, glass, and water shaders

Technical

• JSON level format
• OBJ model support
• OpenGL 3.3 target
• Optimized for Snapdragon 8CX / Windows-on-ARM

🗎 Fully modular and open source (MIT License)

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🚀 Quickstart:

Python 3.10+ is required

1. Clone and Enter the Directory:

git clone https://github.com/ViciousSquid/Fio.git
cd Fio

2. Setup Virtual Environment (Recommended)

python -m venv venv
# Windows:
venv\Scripts\activate
# macOS/Linux:
source venv/bin/activate

3. Install Dependencies:

pip install -r requirements.txt

4. Launch the Editor:

python main.py

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🤝 Contributing

Contributions, feedback, and experiments are welcome. Check issues or open a discussion.