Your costume is ready, the pumpkins are carved, and there's a gallon of apple cider in the fridge. Now all you need to make All Hallows' Eve complete is a good horror movie. Fear not: Rotten Tomatoes has got you covered. With Halloween just around the corner, we went down into the crypt, opened the coffin, and summoned the best-reviewed horror films of all time. Behold -- it's RT's Horror Countdown, a compendium of horror shows with enough vampires, zombies, specters, and mad slashers to keep your spine tingling long after your trick-or-treat candy has gone stale.