Update 26.07.08
First-party weapons/inventory 🔫 screen-space shadows 🌗 editor MCP tools 🤖 targeted addons 🎯 viewport gizmo 🧭 faster clutter 🚀 and a ton of fixes 🛠️
3 Days Ago
Make games without the bullshit.
From the creators of Garry's Mod — a game creation platform built on Source 2 and the latest C#. Create games with an intuitive editor, millisecond hot reloads, built-in multiplayer and share instantly.
Open source. No royalties. No catches.
Latest News
Update 26.07.01
Minor patch this week with fixes and optimizations.
10 Days AgoUpdate 26.06.24
A ton of Rust assets for your games to use, more discovery work to promote new experiences, more fixes, more features, more optimizations
17 Days AgoUpdate 26.06.17
A new arcade racer 🏎️ play maps from other games 🗺️ code archives are private 🔒 more editor tools 🔨 more optimizations 📈 and our plans for the future 📔
24 Days AgoKey Features
A few of our key features of the s&box engine.
Play
Play hundreds of community-made games — from shooters 🔫 and platformers 🧗 to puzzlers 🧩 and racers 🏎️.
Team up with friends 👯♂️ right from the main menu and jump into any game — together.
No installs. No subs. No addons. Just click ⚡ and play 🎮.
Create
Create your own games 🛠️ and playtest instantly with our familiar scene system 🎬.
Build with our first-rate C# API — easy for beginners, powerful for pros 💪.
/// <summary>
/// Moves the object forward in the camera direction when pressing forward
/// </summary>
public class ShipControls : Component
{
/// <summary>
/// The speed to move the object
/// </summary>
[Property, Range( 0, 1000 )]
public float Speed { get; set; } = 200.0f;
protected override void OnUpdate()
{
if ( Input.Down( "forward" ) )
{
var forward = Scene.Camera.WorldRotation.Forward;
WorldPosition += forward * Speed * Time.Delta;
}
}
}C#
Write in modern C# 14 with the latest language features — no legacy baggage 🧳.
Powered by .NET 10 and a familiar Component System — intuitive, flexible, and fast ⚡.
Enjoy smooth performance with no GC stutters 💨.
Open Source
Our code is on GitHub 🤓 and is MIT licensed 😍 - so you can do whatever you want with it.
We believe that the positives of open source massively outweigh any negatives 🧙🏼.
Share
Sharing your game is effortless — just click to publish 📤. Everything uploads automatically and is ready to play instantly 🚀.
Play Fund
Earn real money 💰 when people play your games — our Play Fund rewards creators based on engagement, not ads or microtransactions.
The Play Fund grows with our success - so the more players the game gets, the bigger the pool will be. So far we've paid $688,095.69 !
Multiplayer
Multiplayer is built right into the engine 🔧 — no setup needed.
Playtest your games or levels instantly with the community 🧪🌍.
Hotload
See code changes take effect instantly with blazing-fast hotloading ⚡ — no compiling, no restarts.
Cloud Assets
Create your games and levels with a huge library of assets 🧱.
No downloads, no subs — just drag straight from the asset browser into your scene 🎯.
Hammer
Create levels with Valve’s powerful Hammer Editor 🔨.
We’ve made it moddable — add new tools, UI, primitives, and more 🔧.
Action Graph
Use our visual scripter, ActionGraph, to build interactive experiences — no code, no messy chains of entities 🧩⚡.
Shader Graph
Create unique materials and post-processing effects 🎨⚙️ with ease using our Shader Graph.
Virtual Reality
We’re committed to making VR on PC easy to develop and seamless to play 🥽🚀.
Publishing
Coming soon: export and release your s&box games as standalone titles on Steam 🚀.
Completely free, no royalties, no strings. Your game, your name, your revenue 💼.
Stop reading. Start playing.
Play. Explore. Make Games.