From the book:
"NightLife is a game in which Players take the part of extranatural creatures living secretly in a New York City of the near future. There are number of races available... but all extranatural characters are considered Kin This term is slang among the races in NightLife to distinguish themselves from The Herd, better known as normal Humanity."
In this way, all the modern horror can be encompassed in one game. Among the Kin playable are Vampyres, Werewolves, Ghosts, Daemons, Wyghts, Inuits, and Animates.