Rockman 7 FC/Mega Man 7 & Rockman 8 FC/Mega Man 8, PC, 2008/2010
Probably the least-deserving game on this list, since it’s not even an official port…but I’m sure I’ll get to some really crazy stuff later on in terms of unlicensed games, so why not?
A long time ago, some guys, or one guy, made ports of Mega Man 7 and 8 that redid the entire games in the style of the NES titles, for consistency between Mega Man 1-10. This is awesome. It includes entire legit chiptune soundtracks*, new graphics, adjusted level designs, and everything.
I had the pleasure of playing Rockman 7 FC a few years back, and I gotta say, it simulates the feeling of playing Mega Man 7 as an NES Mega Man game very accurately—which is to say, I sucked ass at it.
(Warning: The video above is an entire playthrough of Rockman 7 FC, so don’t hit play unless you’re ready to deal with the consequences.)
Unlike some of the other games, these were fan-made and freely distributed, so I don’t feel bad tossing up a link to where you can get them. (Don’t ask me for tech support, though!)
Rockman 7 FC: http://www7.atwiki.jp/wakuwakusuru/pub/final2.zip
Rockman 8 FC: http://demake.web.fc2.com/
*special thanks to Inverse Phase for telling me that these are totally legit chiptune soundtracks and not anybody faking it. Go buy his stuff!