This seems like the most difficult era as far as emulation of PC games goes. There was a ton of change and different 3D accelerators during this time and hardwa

This seems like the most difficult era as far as emulation of PC games goes. There was a ton of change and different 3D accelerators during this time and hardware advanced away from things like 16-bit color and dropped support. And it is old news, look up "thief crappy colors" so see all the work that had to be done to get Thief: The Dark Project (and games using the same engine) to look normal on modern hardware. And that was 10-15 years ago. And many games didn't have the fan base to update game like Thief did.