On October 27, 2026, Epic Games CEO Tim Sweeney said Epic does not permit people to use Fortnite intellectual property without permission or compensation. He also acknowledged restrictions on training AI with outputs from Unreal Engine and MetaHuman, and said Epic was working to remove the latter restriction from its license terms. Separate GitHub notices dated October 6 and October 12 contain specific copyright allegations involving Slay the Spire 2 and Minecraft.
What Tim Sweeney said about Epic’s AI rules
Sweeney’s October 27 response separated unauthorized use of Fortnite intellectual property from Epic’s restrictions on AI training with Unreal Engine and MetaHuman outputs. He said Epic was working to remove the AI-training restriction from its end-user license agreement, or EULA. That was a stated plan, not a report that the terms had already changed.
What the GitHub notices allege
The October notices name different targets and alleged material. Tracer submitted the Minecraft notice on Microsoft’s behalf; a representative of Mega Crit Games, LLC submitted the Slay the Spire 2 notice.
| Notice and date | Identified targets | Alleged material |
| Minecraft, October 12, 2026 | Eaglercraft-related builds; three repositories are named publicly, with one additional target redacted. | The notice alleges unauthorized reverse-engineered, ported, or compiled Minecraft clients and assets, as well as interference with or bypassing of sign-in, licensing, or server authentication. |
| Slay the Spire 2, October 6, 2026 | The SlaytheSpire2 repository and four forks. | The notice alleges unauthorized distribution of source code, artwork, user-interface elements, animation, audio, and text. |
GitHub said its review of the Minecraft notice found insufficient information to determine a valid anti-circumvention claim, while identifying other valid copyright claims in the notice. That is GitHub’s stated assessment of the notice, not a court’s decision on infringement.
What these claims say about AI use
The notices concern alleged copying or distribution of game material. Kotaku reported that the Slay the Spire 2, Celeste, and RimWorld targets contained no generative-AI game content. Its account of those projects is distinct from reports of AI-assisted game recreations; the two kinds of story should not be collapsed into one claim about every repository named in a notice.
For Minecraft, the notice describes allegations about Eaglercraft-related builds, clients, assets, and access controls. The details in the complaint concern those alleged materials and activities, while GitHub’s stated assessment addresses the anti-circumvention claim and other copyright claims separately.
