Others have pointed to April's major Nintendo hack, which saw tens of thousands of user details released onto the Internet. Unreleased files for the Pokemon series have been leaking for some time now, with some commenters pointing to those seeming hacks as the source.

This remains a topic of some discussion, with Nintendo so far making no official comment on the Gigaleak. There remains the possibility that false files have been inserted among the rest, but we know that at least some of the Gigaleak are legitimate information. For instance, Q-Games' Dylan Cuthbert - who helped create the original Star Fox games – pointed to a development tool made for Star Fox 2 that he hasn't seen 'for almost 30 years'. The leaks' validity comes down to a couple of factors: 1) The sheer amount, scope and granular detail of information discovered make it very unlikely that someone's fabricated the data, 2) Developers responsible have already confirmed the validity of some parts of the leak. The leaks include (among a lot of other elements), source code for games like The Legend of Zelda: Ocarina of Time, Super Mario 64, and more - as well as entirely unknown games and canceled projects. The first set of files contained data primarily from SNES-era projects, and the second set included information from N64 projects.

The posts each contained gigabytes' worth of files and documentation from internal Nintendo projects. The Gigaleak is made up of multiple drops of information, stemming primarily from two posts on 4Chan.

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