Halloween!
Ah, yes, the greatest game of all: Halloween! Somehow we have been gifted this glorious day in which everyone agrees (well, almost everyone...) to enter the magic circle together and play make-believe. Children, not-quite-children, and the child-at-heart don their costumes and participate in the arbitrary rules of trick-or-treat: approach, knock, state the agreed upon password, receives tokens for your efforts, acknowledge your success, rinse repeat until your legs are as gummy as the candies in your bags.
Tick-or-Treat!