In the past, I've express my love for video game songs arranged in synth for a different console. Each of the 8 and 16-bit consoles/arcades/computers had a very unique sound, and the interpretations made by fans are astounding.
Somehow I came across the works of GeckoYamori on Youtube today, and found a number of excellent SNES songs redone using the YM2612 + SN76489 sound ships found in the Genesis. I know that Nintendo has retrospectively won the 16-bit wars or whatever and the Genesis looked and sounded awful. But, yeah, OK, the SNES sound chip could sound amazing in very particular circumstances, but there's something very hard edged about wailing FM synth guitars and crunchy PCM drums. Personally I think this arrangements are better than their SNES originals, but that's because GeckoYamori did a damn fine job with them.
Here's a bunch of different songs from Super Metroid. Sounds really damn moody.
Here's the first stage of Axelay. Again, totally excellent. Someone in the Youtube comments suggested that the only thing that could make it better would be the orchestral hits found in the soundtrack to practically every Konami arcade game of the early 90s. (And TMNT: Hyperstone Heist for the Genesis, of course.)
Were you disappointed that Sonic 4's music sounded like a Genesis game, except really, really hollow for some reason? This version corrects that. Way better than the official version.
The above (and next two) are from Mega Man X3. I never really liked this soundtrack all that much, but I think it had more to do with the sample programming than the actual composition. It worked great for the style in the first Mega Man X, but both the second and third SNES games sounded really weird. Some of these were improved by the arrangements for the CD versions of X3, but I wasn't a particular big fan of that style. (Here's the SNES and CD versions to compare.) These Genesis mixes really make the songs shine, though. Outstanding work.
MMX3 - Blast Hornet
MMX3 - Toxic Seahorse