I've been thinking about the heavy spider motifs in Homecoming and wondering why they're there.
In the original Silent Hill, Alessa loves butterflies, but that's not the only reason a butterfly-like monster is a boss. Butterflies are well-known rebirth symbols, so aside from how much Alessa may have liked them, they made for a good metaphor. The final boss, though it doesn't look like one, fulfills the butterfly metaphor by being a nmetamorphasis from caterpillar (Alessa) to pupa (Incubator) to butterfly (Incubus).
Spiders are a bigass motif in Homecoming, but I could never figure out why besides Joshua liking them personally, which would be a rather weak reason to load the game with it; all of the bosses are spider-like in some way, the final boss especially so, and the game mechanic of getting back on the right path is a trail of spiders. Then I got it: spiders are one of the bugs known for killing (and usually eating) their children, which would reflect the filicidal ritual sacrifice that caused the events of the game.
In particular, the spider myth of Arachne, some versions of which end in her hanging herself, may relate back to the Holloway murder method and Asphyxia, but that's reaching.