IN THE MOUTH OF MADNESS is horror, but it is pulp horror, with the PI (a very good Sam Neill) tracking down a pulp horror writer a la Stephen King without the name who has ducked out of sight.
LA CONFIDNTIAL is straight up noir -- it has got a tv show within the movie showing you how different reality ("the movie") is, if you're are picking up what I am putting down.
SIN CITY plays off the same noir world of The Batman comics, but it is so over the top that it is pulp. Marv and Dwight are a bunch of low level supers.
ANGEL CITY BLUES is the name of a campaign I am planning that is me taking a spin at SIN CITY...