White Wolf Games publishes a series of horror-genre RPGs, among them: Vampire: The Masquerade and Werewolf: The Ascension.
Changeling: The Dreaming is an RPG where the player characters are changelings--neither of the faerie nor of mortals.
Exalted is an adventure RPG set in the Age of Heroes.
Hunter: The Reckoning is set in the modern day World of Darkness; player characters are human monster hunters.
Mage: The Ascension, also set in the modern day World of Darkness features player characters who are old-style mages in a world of technology.
Mummy: The Resurrection ... do I really have to say it? OK, player characters are mummies, risen from the grave.
Vampire: The Masquerade features player characters who are blood-sucking vampires from differing rival houses.
Werewolf: The Apocalypse features player characters who are werewolves.
Wraith: The Oblivion is out of print.
The WebMaster fails to see any amusement or entertainment value in portraying a vampire, werewolf, or mummy, and has trouble seeing the popularity of these games; however, her friend Andi has played in a few of them, so she'll ask her for a review and get back to you.