Of course, no Halloween game list would be complete without Animal Crossing. With the exception of Wild World, with its grudge against holidays, every Animal Crossing game has some form of Halloween festivity. Whether it be the GCN original's hunt for Jack to get Spooky furniture or New Leaf's wider array of activities involving month-long specials at the Nooklings' store, mask collecting, and neighbor-scaring, there's plenty to do throughout the month of October.
Later entries, especially New Leaf, allow you to customize your look down to the finest details, so you can always be in costume. Or you can just finish a long day by taking an evening stroll through your village, appreciating the change of scenery.