This list of Halloween party adult halloween party activities for adults will make sure that your guests are talking about your Halloween party for years. These Halloween party games all use items that you already have laying around your house so you don't have to spend any money on these Halloween games. And there are plenty of other Halloween freebies where those adult halloween party activities from! For more party ideas check out this list of party games for adults. You could easily make any of them Halloween themed. A murder mystery game is perfect for this time of year.