PAX East 2011 video game convention scenes
Carli Velocci Photo for Boston.com
Ethan Gilsdorf is the author of "Fantasy Freaks and Gaming Geeks: An Epic Quest for Reality Among Role Players, Online Gamers, and Other Dwellers of Imaginary Realms," now in paperback. Follow his adventures at www.ethangilsdorf.com.
Rachel, 18, dressed up as the witch from the "Left 4 Dead" video game series made by Valve. She enjoys the "fear" the character elicits from players and fans. "People have a tendency to fear her," she said, as opposed to other typically "lusty" female video game characters.