I recently read a review of the iSteve movie in the July 2013 issue of MacWorld. I quote:
Despite the movie’s liberties–and it takes a lot of them–it adopts at times a surprising fidelity to historical events. In the end, you might best describe the film as “truth-adjacent.”
I like the term “truth-adjacent” and may adopt it. Another description that seems to be used in the UK but not in North America is “biographical fiction,” which describes my work exactly. “Fact-based fiction” is a term commonly used here, but I dislike it: it has a medicinal flavor.
How would you describe fiction that is based on fact?