The historic handshake between Valve and Facepunch: A new era for independent game developers.

For over a decade, the game development community has eagerly awaited the arrival of Valve 's Source 2 SDK . Now, that dream is becoming a reality, but in an unexpected way. Thanks to a landmark agreement between Valve and Facepunch Studios (the studio of Garry Newman – the creator of Garry's Mods and Rust), the indie gaming world is about to enter a new era.

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The agreement completely changed the situation.

In March 2026, Garry Newman announced groundbreaking news: Facepunch had successfully signed a new license with Valve. This agreement allowed developers to use Facepunch's sandbox (s&box) platform to create games, then export them as standalone executables and sell them directly on Steam as professional products.

The biggest breakthrough of this agreement is that it's completely royalty-free. Developers won't have to pay Valve or Facepunch any percentage of revenue when using this engine (though they will still need to share a percentage with Valve if they sell the game on Steam, of course). Additionally, players don't need to have the Sandbox platform pre-installed on their computers to experience games created using it.

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Motivated by gratitude to the creator of Garry's Mod.

Providing a powerful engine without charging licensing fees is a rare decision in the gaming industry. Explaining this, Garry Newman said that Valve had given him a life-changing opportunity with Garry's Mod in the early 2000s, leading to unimaginable success and wealth.

Now, he feels a responsibility to "ignite the flame" and create a " Garry's Mod moment " for the next generation of creators. Garry wants to remove all legal barriers and financial burdens, giving beginners a chance to succeed without being exploited by the greed of corporations.

S&Box's superior technical strength

s&box is not simply "Garry's Mod 2," but a true game engine and development platform. It is designed to combine the best features of Unity and Unreal, along with the refined "feel" that is the hallmark of the Source 2 engine.

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Impressive Physics and Graphics: Sandbox utilizes a customized version of Source 2's Rubicon physics system (called Box 3D physics), delivering incredibly realistic interaction and collisions, surpassing the somewhat "floating" feel of Unreal's physics system. Visually, the engine leverages Valve's VRAD 3 lighting system and supports native Vulkan, providing smooth AAA graphics even on mid-range PC hardware.

Eliminate compile times: Thanks to "hotloading," developers can change elements in the game world (such as gravity, firing speed) and update them instantly with a single save button while the character is still in the game.

Built-in multiplayer: Unlike many other engines, multiplayer mode is supported from the very first day you create your project.

Valve's clever strategy

Many might wonder: Why doesn't Valve release its own Source 2 SDK? The answer lies at the core of Valve – they are a product-first company, developing tools only for their own in-house games like Half-Life or Counter-Strike. The original Source 2 source code contains a lot of messy, specific code tailored only to their games.

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By licensing the platform to Facepunch, Valve was able to let Garry Newman and his team act as "translators"—cleaning up and refining complex code into a user-friendly, modern, and easy-to-use toolkit for the general public. As a result, the Valve ecosystem continued to thrive without the headache of supporting a public SDK.

The future is right before our eyes.

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The process of rolling out independent game publishing is in the final stages of completing the necessary paperwork. Once everything is ready, this model will be piloted with a select few developers, and the first game expected to be released to demonstrate the potential of this licensing model will be titled "My Summer Cottage". With the official launch of the s&box platform scheduled for April 2026, the Steam gaming community can certainly prepare for a wave of high-quality, professional independent games running on the powerful Source 2 platform.