"What the heck is a Dragon Quest game doing on a Halloween list?" you might be asking. Well, there's good reason Dragon Quest VI is. You see, long before Halloween became the blood-filled fright-fest it is now, it was one of two times of the year when people of almost every culture believed the veil between this world and the next was at its thinnest. That meant the spirits of the dead could cross, of course, but also all manner of other creatures, including fairies -- not the Tinkerbell kind; the steal your soul and curse your cattle kind -- and other nefarious creatures from beyond could walk in our world.
Dragon Quest VI captures that theme perfectly. It alternates between an illusionary dream world and a real world, blurring the lines between both (and even making you a kind of ghost when you first visit the real world). The main antagonist draws his power from both worlds, breeding a host of monsters and causing nightmares in the dream world to create havoc in the real one.