As if it wasn't obvious, Star Rider to be finally emulated. This game was one of the main reasons I got into emulation some 15+ years ago and it still remains elusive.
It has got to be the oldest game where pretty much everything needed to emulate it has been available for years but the will or want from those smart enough to do it just doesn't exist.
I know Philip Bennett had a WIP driver but as far as I know he never submitted anything. Matt Ownby has done quite a bit of work lately to add it to Dexter as can be seen at his blog: