You won't catch me venturing deep into the coding mines, but even so, thinking about the comment-less form AI-assisted code can often take still gives me a stress headache. So you can imagine my reaction when Tim Sweeney recently confirmed via X, "Yes, we are now using AI tools to develop code for Unreal Engine."

This is unsurprising given that, in an Unreal Engine 6 blog post back in June, Epic’s executive VP of development Marcus Wassmer wrote that the company had "opened up pretty broad usage for code generation and AI analysis across our backend, engine, and game development engineering teams." More recently, Wassmer offered a follow-up statement to This Week in Videogames, saying, "We are more concerned about the risks of moving too slowly than we are about AI skepticism."

"Yes, we are vibe-coding things," Wassmer elaborates in his most recent statement, "That means our engineers are no longer writing the bulk of the code, but they are still guiding the tools to get the architectural result we want. We’re not ‘one-shotting’ the engine; we’re iterating with AI to ship features developers want and keep the engine within the memory, performance, and scalability envelopes."

This all follows comments made by Sweeney earlier this week, in which he came out against Steam's AI disclosure statements, claiming that they are " just as partisan as mandatory political essays ." The week before, Epic had announced an AI game jam ( shortly before walking back the AI requirement ), and the week before that the company said it had " vibe coded the Epic Games Launcher to be faster than the other guy ."

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