When Miranda Pakozdi entered the Cross Assault video game tournament this year, she knew she had a slim chance of winning the $25,000 prize. But she was ready to compete, and promised fans watching online that she would train just as hard as, if not harder than, anyone else.

Over six days of competition, though, her team’s coach, Aris Bakhtanians, interrogated her on camera about her bra size, said “take off your shirt” and focused the team’s webcam on her chest, feet and legs. He leaned in over her shoulder and smelled her.

Ms. Pakozdi, 25, an experienced gamer, has said she always expects a certain amount of trash talk. But as the only woman on the team, this was too much, especially from her coach, she said. It was after she overheard Mr. Bakhtanians defending sexual harassment as part of “the fighting game community” that she forfeited the game.

Sexism, racism, homophobia and general name-calling are longstanding facts of life in certain corners of online video games. But the Cross Assault episode was the first of a series this year that have exposed the severity of the harassment that many women experience in virtual gaming communities.