“Screen story” credit is given when a screenplay is based on source material, but the screenplay’s story is new and substantially different from the source material’s. You can read more about this and other credits at the [WGA’s screen credits policy page](http://www.wga.org/subpage_writersresources.aspx?id=171). ### More from johnaugust.com * [The essentials of adaptation](http://johnaugust.com/2003/the-essentials-of-adaptation “The essentials of adaptation”) […]