Howard Scott Warshaw (born July 30, 1957), also known as HSW, is an American psychotherapist and former game designer. He worked at Atari in the early 1980s, where he designed and programmed the Atari 2600 games Yars' Revenge, Raiders of the Lost Ark, and E.T. the Extra-Terrestrial. Warshaw has also written four books, and produced and directed three documentaries.