I heard that YU-NO is pretty good, though haven't played yet. Also heard that it is very hard to finish without a walkthrough.
Played Words Worth for PC98 after playing the windows version, haven't finished it though. Windows version limited how much xp you can gain on each level, while PC98 had this broken difficulty curve where the enemies on the very start of the game are the only ones that can actually kill you, but if you survive them and grind for a bit, the rest of the game is a breeze. The windows version is also made softer, you no longer rape every girl you defeat, and just look at their boobs or whatever instead, it is lamer in that sense. The art in the windows version is better than in PC98 version. Heard that story in windows version was twisted a bit, so it makes less sense, though I don't know what they meant.