While it is true the PC98 had (and still has) quite the share of doujin games, I do not like how the article makes it seem as if all software was games, as if all games were doujin, and all doujin were perverted.
My sincere opinion, as a Japanese-American, is that I have experienced the best stories that games have to offer in eroge (erotic games), that stuff beats out so-called mainstream titles (AAA and otherwise) any day of the week. A number of them have made me cry genuine manly tears, and I am not ashamed to admit it.
This is to say, I came for the seckz and stayed for the plot.
I found the gem-saves gimmick particularly brilliant.
Also notable were the nonogram puzzles.
0. https://en.wikipedia.org/wiki/YU-NO:_A_Girl_Who_Chants_Love_...
[1] http://www.shii.org/geekstories/eroge.html
Edit: Archive.today link https://archive.today/20121205102947/http://www.shii.org/gee...