She grew up playing Donkey Kong in the back of her parents' car on long drives from her Campbelltown home, but now Siobhan Reddy sits alongside the Queen, J.K. Rowling, Adele and Victoria Beckham in the top 100 most powerful women in Britain.

Reddy, now 33, left her parents' Ruse home at 18 to follow her dreams of developing computer games.

"It was a total surprise" ... Siobhan Reddy.

She said she had ''no idea what I was doing'' when she made the move.

But after winning a production award at the first ever Microsoft Women in Gaming Awards in 2009 and now judged by BBC to be one of 100 women to have the greatest impact on British politics, society, culture and the economy, it's fair to say the move paid off.