Harry Potter a cause-and-effect relationship, there is a clear correlation, and it seems that Harry Potter's cultural impact may be stronger than just a fandom bond. Many fan fiction and fan art works about "Harry Potter" have been made. In March 2007, "Harry Potter" was the most commonly searched fan fiction subject on the internet. At the University of Michigan in 2009, StarKid Productions performed an original musical parodying the "Harry Potter" series called "A Very Potter Musical". The musical was awarded "Entertainment Weekly"'s 10 Best Viral Videos of 2009. The sport Quidditch, played by characters in the "Harry Potter" series, was
Harry Potter and Harry, Voldemort, and Hermione as playable characters. In 2017, Warner Bros. Interactive Entertainment opened its own Harry Potter themed game design studio, by the name of Portkey Games; before releasing in 2018, developed by Jam City. All seven "Harry Potter" books have been released in unabridged audiobook versions, with Stephen Fry reading the UK editions and Jim Dale voicing the series for the American editions. "Harry Potter and the Cursed Child: Parts I and II" is a play which serves as a sequel to the books, beginning nineteen years after the events of "Harry Potter and the Deathly Hallows".