The incredible beauty of Diabolic Lune, a Japanese adult PC game from 1997. An adventure+simulation hybrid where you play the caretaker of a princess, the art, music and atmosphere are superb. It also later got a sequel that turned the concept into a full fledged fantasy epic.
D'ark on PC98 is basically the coolest game ever made. Here the main villain (who is the good guy) dies standing up with a sword through him against the light.