A dark adventure game that explores the twisted designs of a madman and involves the supernatural, D is set at the L.A. National Hospital. The hospital is dark and there's no way to know what's lurking in the shadows. Players take the role of Laura, the daughter of a doctor who has gone mad and embarked on a murderous rampage. Laura must find her father and end his insanity, lest the powerful forces set against her claim not only her life, but her soul as well.
As Laura moves through the dark hospital, which is rendered with 3D graphics, she must search for the clues that explain the cause behind the horrific events that have taken place. Puzzles and conundrums are plenty and solving them quickly may be crucial, as Laura must save her father before the game's two-hour time limit expires. Gruesome scenes are abundant in this "T"-rated game, as are violent and scary encounters.