D is another "well-known once, forgotten name" game. That's because it was kind of an evolutionary dead end, from the brief period where we thought pre-rendered CG was impressive enough for regular people to buy a pretty niche adventure horror game. I finally played D a year or two, btw. It's decent, the flashback scenes are still stylish and effective. D2 is completely different but it's pretty good too, despite some flaws (mostly lots of overlong dialogue that needed to be edited).