You can organize a costume contest, wherein your guests can flaunt their costumes pertaining to a specific theme. Trivia and Charades can also be customized according to specific movies or movie scenes. A person can act out a movie scene while others can try to guess it. Apart from these, you can organize a spooky game for a Halloween-themed party. Some examples of such games are Witch Hat Ring Toss, Eyeball Pong, Shoot the Skeleton, and Spider Race.