Halloween Retro Picks?

I'm not normally one for themed, seasonal gaming... but Halloween seems to lend itself particularly well to playing a particular type of game.

So what are you playing this spooky season?

This year, I'm playing through Castlevania: Dawn of Sorrow (DS version, via the Retroid Pocket 2S). It's not the spookiest entry in the series, but has enough creepy castle exploration to fit the bill.