Build for s&box

Game development

C#, Source 2, hotloaded in milliseconds. Everything you need to go from empty project to published gamemode, and the news that moves the scene.

Official documentation

s&box Learn

Facepunch's official learning portal: structured courses that take you from first launch to shipped game.

s&box Documentation

Facepunch's official docs: engine concepts, components, networking, publishing.

Getting Started

Zero to a running project: install, editor tour, your first gamemode.

API Reference

The full engine API, straight from the source.

sbox-issues

Facepunch's public issue tracker: report bugs, follow engine work as it lands.

Tutorials & videos

S&box Tutorial: Creating your first Project (Beginner) · SmallFishDev

How to make a Multiplayer Game in S&box in only 3 minutes · Sandking

SmallFishDev

Consistently good how-to videos on real s&box development.

Sandking

s&box tutorial channel covering practical build-along topics.

Community docs

sbox.guide

Community API documentation: 3,000+ types and 28,000+ members, searchably indexed.

s&box Community Docs

Community-written API reference and development guides.

Recommended tools

oursClaude Bridge for s&box

Drive the s&box editor with AI. By far the most complete and comprehensive toolset for what it does: 232 tools for building scenes, components, UI, and whole gamemodes from a Claude conversation. Built by us.