yuzu

» see yuzu-emu.org as it lived, on the wayback machine

~ the obituary ~

Emulators were part of my decade, just an earlier one. In an Ankara internet cafe around 2003 you would find someone running an old console on a machine bought for Counter-Strike, and the whole appeal was that hardware from ten years ago could be reproduced in software by hobbyists. yuzu belongs to a later and much riskier version of that idea, and i was not near it. Its peak years, 2018 through 2024, are years i spent on computer vision rather than on what my desktop could pretend to be.

yuzu was released on 14 January 2018 by the same developers who had written Citra, the Nintendo 3DS emulator. Work reportedly began within days of the Switch launch. It was open source C++, and it did the thing that made emulator projects historically defensible in the United States: it reimplemented the console's behavior rather than copying its code, on the precedent that Sony lost against Connectix and Bleem a generation earlier.

The difference from every emulator that came before was timing. Older projects worked on hardware the manufacturer had abandoned, which made them archival. yuzu ran games that were on sale that week, on a console Nintendo was still selling. It ran them well enough that people used it instead of buying the machine. The legal entity behind it, Tropic Haze LLC, took Patreon money for early access builds, close to 7,400 paying members and around thirty thousand dollars a month by the time Nintendo counted it in a court filing.

~ the case file ~

~ what nintendo actually argued ~

The complaint, filed on 26 February 2024 in the US District Court for the District of Rhode Island, mostly avoided the emulation question. Nintendo went at the encryption instead. Switch games ship encrypted and the console decrypts them at runtime using product keys burned into the hardware. yuzu required a user to supply those keys, dumped from a real Switch, and then decrypted the game the same way the console would. Nintendo called that circumvention under the DMCA, which is a different law from copyright infringement and much harder to answer with the Connectix precedent.

The rest of the filing was about scale. Nintendo pointed at the leak of The Legend of Zelda: Tears of the Kingdom, which went online around 1 May 2023, a week and a half before release, and was downloaded over a million times before the game was in shops. The sites hosting it advertised that it ran in yuzu. Nintendo used the phrase piracy at a colossal scale and asked for the project to stop entirely.

~ seven days ~

There was no case. Tropic Haze settled on 4 March 2024, agreeing to pay 2.4 million dollars and accepting a permanent injunction. The terms went further than a shutdown: the developers took down yuzu and Citra both, surrendered the domains, pulled the source repositories, and agreed to stop distributing or supporting either project. A six-year-old open source program removed itself from the internet by consent, having never been ruled against by a judge.

The speed is the part worth sitting with. Nintendo did not need to win. It needed a small company to look at the cost of defending a DMCA circumvention claim against a plaintiff with unlimited legal budget, and to do the arithmetic that every hobbyist project does at that moment.

~ the forks ~

The code was open source and had been mirrored thousands of times before the takedown, so it could not actually be recalled. Forks appeared within days under new names, some of which were themselves pressured off GitHub. Ryujinx, the other major Switch emulator, kept going until October 2024, when its lead developer was approached by Nintendo and the project stopped in the same quiet way.

What died on 4 March was not the software. It was the assumption that writing an emulator in the open, under your real legal name, with a funding page attached, was a survivable thing to do while the console was still on sale. The projects that continue now are anonymous and unfunded, which makes them harder to sue and harder to trust.

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