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Report: Source Code for Older Nintendo Gaming Systems Leaks Online

Speculation is high that the leaked files, which include source code for the Nintendo Wii, originated from a 2018 computer hack, but Nintendo has not yet commented publicly on the alleged breach.

 & Michael Kan Principal Reporter

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The source code for Nintendo’s older consoles—the Wii, GameCube, and Nintendo64—has apparently leaked on the internet, giving modders a chance to reverse-engineer the technology behind the hit gaming systems. 

In the past weeks, the stolen information has been appearing on 4chan, culminating in a new 2GB dump over the weekend that contains internal documentation for Nintendo’s gaming systems, according to internet users who’ve looked through the files.    

The same dump also contains the technical “Verilog” files for every component in the Wii, including the CPU. “Verilog is a hardware description language; is used to describe circuits via code, so with this we can learn how every single piece of the Wii was made,” wrote a user named “Atheerios,” who brought attention to the leaks over the weekend.   

Nintendo did not immediately respond to a request for comment, and the legitimacy of the stolen source code hasn't been fully confirmed. 

In the meantime, speculation is high that the leaked files originated from a 2018 computer hack. A former security researcher at Malwarebytes named Zammis Clark infiltrated Nintendo’s internal network, which let him break into the company’s confidential game development servers. Clark later pleaded guilty for the computer hacking crimes. But it’s possible he may have shared documents he stole from Nintendo with others on the internet. Last year, Clark was sentenced to 15 months in prison, but only if he re-offends.    

As for Nintendo, the company won’t lose much financially from the leak. The Wii and the other affected gaming systems launched over a decade ago. However, the stolen source code and documentation does pave the way for the gaming community to create illegal clones of Nintendo’s consoles, which the company would almost certainly try to quash.

On 4chan, rumors are now circulating that the leaked files are part of a larger 2TB archive, meaning more sensitive information may be dumped in the coming days or weeks.

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About Our Expert

Michael Kan

Michael Kan

Principal Reporter

My Experience

I've been a journalist for over 15 years. I got my start as a schools and cities reporter in Kansas City and joined PCMag in 2017, where I cover satellite internet services, cybersecurity, PC hardware, and more. I'm currently based in San Francisco, but previously spent over five years in China, covering the country's technology sector.

Since 2020, I've covered the launch and explosive growth of SpaceX's Starlink satellite internet service, writing 600+ stories on availability and feature launches, but also the regulatory battles over the expansion of satellite constellations, fights with rival providers like AST SpaceMobile and Amazon, and the effort to expand into satellite-based mobile service. I've combed through FCC filings for the latest news and driven to remote corners of California to test Starlink's cellular service.

I also cover cyber threats, from ransomware gangs to the emergence of AI-based malware. In 2024 and 2025, the FTC forced Avast to pay consumers $16.5 million for secretly harvesting and selling their personal information to third-party clients, as revealed in my joint investigation with Motherboard.

I also cover the PC graphics card market. Pandemic-era shortages led me to camp out in front of a Best Buy to get an RTX 3000. I'm now following how the AI-driven memory shortage is impacting the entire consumer electronics market. I'm always eager to learn more, so please jump in the comments with feedback and send me tips.

The Best Tech I've Had:

  • My first video game console: a Nintendo Famicom
  • I loved my Sega Saturn despite PlayStation's popularity.
  • The iPod Video I received as a gift in college
  • Xbox 360 FTW
  • The Galaxy Nexus was the first smartphone I was proud to own.
  • The PC desktop I built in 2013, which still works to this day.

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