Nintendo's DMCA sweep removes 144 Switch mod chip firmware repos and two emulators from GitHub

What happened

Nintendo has sent four DMCA takedown notices to GitHub, and the platform has complied, according to IGN. The notices covered two Nintendo Switch emulators, Yuzu and Citron Neo, along with firmware used to run mod chips on Switch hardware.

The single largest removal involved firmware that was spread across 144 repositories. Every one of those repositories has been taken down and now shows a DMCA takedown notice where the code used to be.

The mod chip angle appears to be the focus of this round. As IGN explains, chips such as Picofly can be soldered onto the Switch's mainboard and then flashed with this firmware, which circumvents the console's copy protection.

What the notice argues

GitHub published Nintendo's notice, which is dated November 6. In it, Nintendo argues that the Switch console and its games rely on technological protection measures, or TPMs, that allow the console to interact only with legitimate Nintendo game files. According to the notice, these measures exist to stop users from playing pirated copies of Nintendo games on the Switch and from copying and playing those games on unauthorized devices.

That framing matters. By centering the claim on protection measures rather than emulator source code itself, Nintendo's strongest target is the firmware designed to defeat the console's checks, not general-purpose emulation projects.

A repeat pattern

As IGN notes, this is neither the first time Nintendo has sent takedowns to GitHub nor the first time it has gone after Yuzu. In 2024, the company removed roughly 8,500 copies of the emulator with a single notice aimed at 12 different mirrors.

The current sweep also appears incomplete. According to TorrentFreak, the same mod chip firmware still seems to be hosted elsewhere on GitHub, which leaves room for additional notices if Nintendo decides to continue.

Timing and the AI backdrop

The takedowns arrive just days after emulators managed to run the remake of The Legend of Zelda: Ocarina of Time on PC, something IGN reads as a possible sign that Nintendo is gearing up for another broader crackdown on emulation.

The surrounding landscape has also shifted since the 2024 campaign. IGN points to a wave of AI-made mashup mods that spread across social media and prompted Anthropic to add a guard preventing Claude from outright copying games. Publishers have started acting on AI-generated projects too: last month Rockstar took down a browser version of GTA 5, and Bethesda removed an AI-generated Fallout New York game.

Why it matters

GitHub hosts a large share of the open source emulation scene, and DMCA action at this scale can delete hundreds of repositories in one stroke, as the 144-repo firmware removal shows. For developers, each sweep shrinks the number of places emulator and firmware projects can live and pushes them toward mirrors with less visibility and oversight.

For Nintendo, targeting mod chip firmware is a comparatively safe legal position, since the code exists specifically to defeat copy protection. And with AI making unauthorized ports and remakes cheap to produce, rights holders look increasingly willing to lean on takedown mechanisms. Emulation projects should expect the sweeps to keep coming.