Masato Nakamura says he composed the remix of Sonic the Hedgehog's Green Hill Zone theme the way he did the original: By imagining it as a film. The difference is he only had still photographs when he wrote the song 20 years ago. Now for source material has the advantage of full motion video -- and, of course, one of video gaming's most iconic pieces of music.
Wrapping up a series of vignettes on Sonic's 20th birthday, Sega takes a look at the substantial musical history of its flagship series. I'm not sure I gave the soundtrack in Sonic Generations enough credit; the remixes were very well done, although some of the tunes with vocals (notably City Escape's) had a sugar-pop way of boring into your skull.
But in any ranking of contributors to the much loved genre of video game music, Sonic and its artists would have to get a prominent mention. This video gives them a chance to take a bow, so give it a watch.