D [LONG BOX] (PS1 PLAYSTATION)

The story begins in 1997. It is the middle of the night in the city of Los Angeles, and there has been a mass murder in a general hospital on the outskirts of downtown. The assailant is the director of the hospital, Richter Harris. He locked himself in the hospital and took a number of patients hostage, leaving the police helpless and unable to move in. After hearing the situation, Richter's only daughter, Laura Harris, rushes to Los Angeles from San Francisco at the tragic scene. to the hospital. Upon entering, Laura finds herself transported to an old mansion, while her father's disembodied voice begs her to leave. Nevertheless, she must press forward to save her father and herself.

D is a puzzle game asking Laura to solve esoteric inventory puzzles within a very strict time limit. Each of the game's four discs must be completed in about thirty minutes each, and saving is not an option. The time is recorded using Laura's pocket watch. The pocket watch can also be used to provide clues for puzzles, but after three uses the glass will shatter and stop working. The game also has multiple endings.