Halloween Party Games
Several ideas on this blog translate well to teenagers. The game "Witch's Brew", where players concoct the most disgusting drink, will especially appeal to teenage boys. Other good ideas include a graveyard scavenger hunt and "Bandage the Mummy," a race to see who can wrap players in toilet paper the quickest.
Halloween Party Games for Kids, Teens and Adults
Not a lot of suggestions for teens, but the "Most Monsterous Makeover" is worth a mention. Players compete to see who can create the best monster--Halloween makeup and props to be provided by host.
Halloween Games for Teenagers
These games might be a bit young for teenagers, but worth glancing at. Games include Halloween Scary Tableau, Monster Maker, and Candy Bar Guessing Game.