Kitten Space Agency and Icarus developer RocketWerkz and sport platform operator Ahwoo—each based by veteran DayZ developer Dean Corridor—have introduced the open supply launch of the sport improvement framework generally known as “BRUTAL,” a C#-based framework that provides builders one other different to third-party sport engines like Unity, Unreal Engine, and even Godot.
The framework combines C# and .NET with C++ libraries and low-level graphics entry, appearing as a basis for builders to construct and keep their very own improvement instruments.
Such choices have develop into extra engaging after main debacles just like the Unity Runtime Fee saga and Epic Video games’ announcement that it might be depreciating Unreal’s Blueprints operate have given some builders trigger for concern in regards to the stability of their tech stacks. RocketWerkz has been personally utilizing BRUTAL within the improvement of Kitten House Company, however builders searching for an exterior case examine ought to try the newest replace to Ludeon Studios’ Rimworld. The developer announced last week that it had ported the sport off of Unity onto a brand new sport engine known as “Waylith,” which it says provides gamers higher efficiency and a quicker start-up time than seen in earlier variations.
The framework is free to make use of in business video games with no royalty necessities, although the open supply license does require builders to offer attribution and show a brand earlier than gameplay when gamers load your sport.
Builders ought to know that adopting BRUTAL will not be so simple as choosing up different beloved open-source engines like Godot. BRUTAL is a programming framework that may be a basis for proprietary sport engines or just a way to make your sport from scratch—a more difficult feat that requires a willingness to embrace the nuts and bolts of a programming language like C#.
In 2025, Corridor and Kerbal House Program creator Felipe Falanghe defined to Recreation Developer that they discovered working with BRUTAL to be a lot simpler due to developments in massive language fashions (LLMs). The AI instruments allowed Corridor, Falaghe, and their colleagues to ask questions on C# libraries and Vulkan documentation, that are each “extremely structured, with very clear syntax.”
“An LLM is basically tokenizing language, then placing plenty of vectors round that to construct linkages between these tokens,” Corridor stated on the time. “What might be higher than a highly-structured, in actual fact brutally structured language?”
The pair stated this course of was not the identical as “vibe-coding,” which robotically generates code based mostly on consumer prompts.
Will extra builders make their very own sport engines?
Ludeon Studios’ choice to port Rimworld off of Unity and onto a customized engine powered by BRUTAL additionally serves as a case examine for Corridor’s perception that programming frameworks, somewhat than third-party engines, are the way forward for sport improvement. Reliance on third-party engines has lengthy been a bugbear for Corridor, who called out Unity in 2025 for allegedly threatening to terminate Rocketwerkz’ license over what he stated had been false accusations of violating its phrases of service.
“You might be solely as unbiased as your instruments are,” he stated in a press release accompanying the announcement, saying that whereas not each developer ought to need to make their very own sport engine, each developer ought to have “the choice to take action.”
This notion has actually struck a chord with builders like Mega Crit in the previous couple of years, which switched from Unity to Godot whereas making Slay the Spire, and barely misplaced any improvement time within the course of.
Nonetheless, do not anticipate BRUTAL to develop into the definitive framework for sport improvement anytime quickly. Corridor informed Recreation Developer final yr that he’d favor it if different builders created their very own “less complicated” frameworks following the same strategy, somewhat than attempting to show the open supply framework into an trade normal.
“BRUTAL was made to ship a really particular, sort of hard-to-make sport the place it’s worthwhile to sit down and ask a complete bunch of questions [about how it works],” he stated—an strategy that some builders will definitely welcome with open arms. Others will understandably faucet out of such a frightening process.