looking into pc-98 games, already thinking of trying YU-NO among others
Night Slave
Power DoLLs series
Marble Cooking
Farland Story (Somehow this got a fan translation)
Off the top of my head
>>3888035
Try policenauts, tōhō serie, cosmology of kyoto and Rance serie
EVO just received a very nice fan translation not too long ago.
Although it's all in japanese, you have the better version of Shiryu Sensen: War of the Dead Part 2 as well (action-horror game). Only the MSX version is translated, and that is beyond choppy (you move as fast as your bullets).
>>3888789
Oh shit, I remember wishing years ago that this game was translated.
Shit man, what kind of games you looking for and how much Japanese you know? 46 Okunen Monogatari (E.V.O.) is a good one to start with if you're into RPGs and have little Japanese knowledge since it was fan translated.
There's also a bunch of action games like Rusty or Totsugeki Mix (same developer) that are pretty damn good, if difficult. Rusty's getting translated though, so might hold back on it if you want the story when you play.
You've got your standard VN stuff available all over too.