Epic Games will let Fortnite creators publish islands containing LLM-driven characters with synthetic voices starting July 30, expanding a toolset that could make user-made Fortnite spaces more conversational and, if handled badly, more annoying at scale.
The company said it has prepared 36 Fortnite characters for creators to use as non-player characters, each with a defined voice and persona. The roster includes familiar Fortnite characters such as Agent Jonesy, Peely, Fishstick, and Cuddle Team Leader, according to Epic.
The mechanic is straightforward enough: creators can place these characters in their own Fortnite experiences, and the characters can generate spoken responses through large language model conversations. That means the dialogue is not limited to a fixed script in the usual NPC sense. It also means Epic is trying to bolt generative AI onto a game already packed with children, brand tie-ins, competitive play, and user-generated weirdness. What could possibly require guardrails.
Epic says actors consented to the voice models
Epic said the voices for the new characters were built from performances recorded by independent professional actors for use in developer-made islands. The company said those actors agreed that their performances could be used to develop voice models that generate the spoken lines for these LLM-based Fortnite characters.
That consent claim is doing a lot of work. Voice cloning and synthetic performance have become a live labor issue across games, film, and online media, especially where performers’ voices can be reused after the original recording session. Epic did not name the actors in its announcement, according to the details made public.
Fortnite content creator Shiina posted a video on X showing samples of some of the new voices and said UEFN creators will be able to use them on July 30.
Epic also said it wants to pursue a broader set of voices tied to actors who have already appeared in Fortnite Battle Royale. The company said its next step is to work with the relevant guilds and those character voice actors to look at making their original voices available across Fortnite. That phrasing signals the obvious blocker: Epic still needs approvals before it can turn recognizable performances into reusable synthetic NPC infrastructure.
Darth Vader was the test case
Epic previously tested this idea with a Darth Vader NPC in Fortnite that used James Earl Jones’ voice. Epic said at the time that Jones’ estate approved the collaboration.
Players quickly pushed that Vader character into swearing, and Epic said it fixed the issue soon after. The incident was a tidy preview of the problem Epic is now scaling up: LLM characters can produce flexible dialogue, but flexible dialogue inside a live multiplayer game needs moderation, filters, and policy choices that hold up when players deliberately try to break them.
After launching the Vader NPC, Epic said Fortnite creators would eventually be able to build their own AI characters. Earlier this year, the company began letting creators test those characters and set rules meant to keep them from becoming problematic, according to Epic.
Creators now get a more official starter pack: 36 existing Fortnite characters, synthetic voices Epic says were built with actor permission, and a July 30 publishing date. Players get more talking NPCs. The interesting part will be whether those NPCs behave better than the internet predictably asks them to.
This story draws on original reporting from The Verge.
