So, I suppose no one has brought this up in here yet. I would've mentioned this in a CD hacking thread, but this mod is a pretty big thing that I'm sure more people would want to see. There's now a mod for Sonic CD-- Time Travel Overhaul, by TheStoneBanana --where you can time warp just as Oshima intended! Complete with Back to the Future esque fire trails. Full notes: Go here on GameBanana to download it, if you have a copy of Sonic CD for Steam. After playing a full 100% run with it (twice), I can confirm this is the best the game has ever played. It's so nice to see this title finally live up to the original vision. Plus, the QOL changes are things I think anyone could appreciate.