From the creators of Garry's Mod, s&box gives you modern C#, powerful Source 2 technology, an intuitive editor, hot reloads in milliseconds and multiplayer built in. Create, playtest and publish without leaving the editor.
Open source. No royalties. No catches.
The s&box editor is modern, familiar and intuitive. If you've used another game engine, you already know your way around: scenes, GameObjects, components, inspectors and an asset browser.
Change C# while the game is running and see it take effect in milliseconds. No restart. No waiting for a build.
It works in multiplayer too. Hotloaded code is sent to everyone in the session, so the whole playtest updates as you work.
Networking is built into the engine from the start. Turning any experience into multiplayer is intuitive, not a separate problem you have to solve later.
Change the code or edit the scene and it hotloads on every client. No builds to package, upload or send around.
Publish straight from the editor. Your game and its assets upload together, ready for anyone to play instantly.
Publish again and everyone gets the latest version. Or export a standalone build and release it on Steam under your own name.
Our Play Fund pays creators based on how much people play their games. No ads or microtransactions required.
Our code is on GitHub under the MIT license. Read it, change it, and make it work for you.
Build levels with Hammer, then extend it with your own tools, UI, primitives and workflows.
Drag models and materials straight from the asset browser into your scene. Dependencies are available without hunting down downloads first.
Build interactions visually when code would get in the way. Use graphs alongside C#, not as a separate workflow.
Build materials and post-processing effects visually, with live feedback in the editor.
Build PC VR games with the same scenes, components and multiplayer systems as everything else.
Sculpt heightmaps and paint materials straight in the editor. Large outdoor scenes without bolting on a separate tool.
Export your game and release it as a standalone title on Steam.
No royalties. Your game, your name, your revenue.
Get the editor or dig into the docs.
