You’ll also find costumes based on your favorite video game characters from Assassin’s Creed and Overwatch. Whether you want to grab a sexy women’s costume for an adult-only Halloween party, or you want to get matching costumes for you and the whole family, you can find the latest and greatest costumes for right here at Spirit! Find The Best Halloween Costumes For Women At Party City. Find fun, fierce and flirty costume ideas for women at Party City! Whether you’re getting ready for Halloween, costume parties or a convention, our selection of female Halloween costumes makes it easy to achieve the look you want.