Helen Kennedy also believes that a larger presence of women in the games industry will change the landscape of the games themselves.
She cites Maxis, creator of The Sims, and Mind Candy, whose Moshi Monsters have become a big hit among the under-12s, as two games developers with a good balance of men and women on board.
"If you have more women on your team, you might get a different dynamic in the workplace that might transform some of the decision making that happens," she said.
That's not to say that female characters would all suddenly start wearing sensible shoes and sports bras.
"Women like to make sexy women too," said Ms Kennedy.
"They might be less overly hyper-sexual, less passive, there might be more complicated characterisation, but women love active sexy women just as much as men do.
"It's the victim or passive wall-dressing that you get that women find rather repellent."
The theme for games created at the XX Game Jam was clockwork, a nod to Ada Lovelace, the female mathematician credited with writing the world's first computer programs in the 1800s.
She worked with Charles Babbage, an inventor whose "difference engine", a complex calculation machine which he designed but never built, is now considered to be the earliest computer.
The women worked in teams of five and their games included clockwork crocodiles and android Grim Reapers.
"We're all helping each other out, solving each other's problems," said participant Jo Evershed.
"Tool challenges have been our biggest challenges, getting our computers working together, understanding each other's strengths and limitations.
"As always in all projects, it's the human bit that's the difficult bit."
The prizes for the winning team were tool kits - a nod to the masculine environment that women in the games industry find themselves in.
"I hardly ever see any women in my job," said developer Helen Mealey, who had only previously attended game jams as an online participant. "It's a nice change."
The XX Games Jam will also feature on Click Radio, BBC World Service, on 6 November.