As it is the day for it what are your favourite spooky games?
To start I nominate:
Ghosts 'n' Goblins (C64) - great graveyard antics. I recommend the C64 version for the "woooooo" music.
Resident Evil - more fun to think about than play perhaps, due to the fiddly control system (zombie walks into room, player proceeds to repeatedly run into the opposite wall shooting the ceiling), but atmospheric enough to produce many willies.