Nope, it's just Nintendo's legal department frantically photocopying cease and desist letters in preparation for a new onslaught of homebrew PC ports of its Nintendo 64 games from the 90s.
Several real hardware-compatible homebrew N64 games and ROM hacks also keep releasing, including highlights like the 30-fighter Smash Remix and Mario 64 engine rewrite, Peach's Fury. This article ...
rather than relying on more obscure hardware such as the N64DD modem or other rarities. We’ve seen other N64 homebrew hacks before, too. Video after the break.