The only one that's difficult to emulate is the N64. Last I checked there wasn't an agreed upon project like there is for the GC/Wii and other Nintendo consoles.
That is a software emulation of the RDP from the n64 that runs in a shader on your GPU. No more visual bugs, no more artifacts, no more perfect dark missing a visual effect that kills an entire mission, and accurate upscaling, and it actually runs very well even on cheap GPUs.
What? I've been playing emulated N64 games with sixtyforce on my Mac without issues for years, easily since I was a kid in high school.
Your assertion of a social requirement for an "agreed upon" project is false: every emulator is valid, though some have their pros and cons. If it plays the game you want to play just fine, what makes it "difficult"?
>What? I've been playing emulated N64 games with sixtyforce on my Mac without issues for years, easily since I was a kid in high school.
And all those emulators use the same graphics plugin system, which only had TERRIBLE plugins until a couple years ago when angrylion and PareLLEI showed up. The RDP was always poorly emulated.
Compare to Dolphin, which is an open source emulation masterpiece, and has things like ubershaders to give you both performance and emulation accuracy.
For over a decade, you couldn't play through perfect dark with just a single graphics plugin unless you were cheating your way through a mission.
Even Nintendo's official n64 emulators for VC are mediocre