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.
First-party weapons/inventory 🔫 screen-space shadows 🌗 editor MCP tools 🤖 targeted addons 🎯 viewport gizmo 🧭 faster clutter 🚀 and a ton of fixes 🛠️
7 Days AgoMinor patch this week with fixes and optimizations.
14 Days AgoA ton of Rust assets for your games to use, more discovery work to promote new experiences, more fixes, more features, more optimizations
21 Days Ago
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 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;
}
}
}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 💨.
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 🧙🏼.
Sharing your game is effortless — just click to publish 📤. Everything uploads automatically and is ready to play instantly 🚀.
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 $699,507.50 !
Multiplayer is built right into the engine 🔧 — no setup needed.
Playtest your games or levels instantly with the community 🧪🌍.
See code changes take effect instantly with blazing-fast hotloading ⚡ — no compiling, no restarts.
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 🎯.
Create levels with Valve’s powerful Hammer Editor 🔨.
We’ve made it moddable — add new tools, UI, primitives, and more 🔧.
Use our visual scripter, ActionGraph, to build interactive experiences — no code, no messy chains of entities 🧩⚡.
Create unique materials and post-processing effects 🎨⚙️ with ease using our Shader Graph.
We’re committed to making VR on PC easy to develop and seamless to play 🥽🚀.
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 💼.
Play. Explore. Make Games.