It's always so weird to me that
Silent Hill references
Kindergarten Cop. I always forget that it does and am surprised each time I'm reminded. That's not really the focus of this thread, but I do like the scope of a horror game referencing any kind of movie, horror or not (and vice versa: horror movie reference in non-horror game). Vague or indirect inspirations are welcome, too, but I'd like the meat of this thread to be direct references to horror films.
Might even be worth going into all of the specific references for each game. I'd have to play through some of the games I mentioned to even remember them all, although there are probably sites that already list these things.
Another obvious one is the
Contra series. Sure, trudging more into sci-fi territory, but the first
Alien is totally a horror flick and
Aliens has elements of such. There's the eggs where the Facehugger-looking creatures emerge, a lot of the backgrounds look lifted from H.R. Giger's designs, the aliens themselves looking very Xenomorph/
Necronom IV, and this thing...
...damn, that's gotta be a reference to something, isn't it? Or were the people who designed that creature for the game just that talented at crafting something so bizarre?
One of my favorite movie nods is in
Splatterhouse 2, the first boss. Totally lifted from
The Deadly Spawn, and it's one of my favorite creature designs.
Those teeth!
This fan art is pretty badass:
Also, I'm pretty sure this mid-boss from the first game is meant to reference Jason Voorhees' appearance in
Friday the 13th Part 2 with the towering figure and potato sack (and possibly some more
Evil Dead II love with the chainsaw hands):
Jason vs. Jason (the hockey mask an obvious homage to Jason's more iconic look from
Part 3 and onward).