I've noticed Retro Achievements supports certain game console emulators. I was using BizHawk emulator to play Croc: Legend of the Gobbos for the PlayStation 1. It wasn't entirely smooth, but I did unlock an achievement once I found 6 lost Gobbos.
Old PC games tend to look much better than old console games. With the Croc Unofficial Update and unofficial Definitive Edition patch, I got my Croc looking beautiful.
Only issue is not unlocking achievements.
I was hoping to raise attention to this in hope that old PC games would also some day get an achievements option, just like Retro Achievements and emulation consoles.