Facepunch/sbox-public

s&box is a game development platform built on Valve's Source 2 engine, integrating the .NET runtime as a first-class scripting and gameplay logic layer. It provides a full-featured visual editor that combines asset management, level design, and code editing into a single workflow, enabling developers to create and edit games within a modern editor environment.

The platform distinguishes itself through a managed-native interop bridge that allows C# code to interact directly with native Source 2 systems for high-performance communication, alongside a hot-reload scripting system that supports live code changes during gameplay without restarting the session. An entity-component system architecture organizes game objects as entities with attachable components, enabling modular behavior composition through C# scripts.

The development pipeline includes an asset compilation process that transforms source assets into optimized runtime formats, and the editor-first approach integrates all stages of game creation into a unified interface. The platform is designed for building and iterating on games using Source 2's rendering, physics, and world simulation capabilities through the managed .NET runtime layer.