The one Retroarch Intellivision core, FreeIntv, has achievements for the two AD&D games and Ice Trek. As of right now, only the prototype version of Cloudy Mountain is supported (with "Adventure" on the title screen) and ROM images have to be in .bin+.cfg format. The exec.bin and grom.bin files have to go in the System subfolder within Retroarch and have to be in lower-case.
I hope there will be more achievements in the near future and that the core continues to be improved. For now, enjoy.
I hope there will be more achievements in the near future and that the core continues to be improved. For now, enjoy.