Superman "Superman", and released in 1979 for the Atari 2600. The last game centered on Superman was "Superman Returns" (adapted from the movie) in 2006. Superman has, however, appeared in more recent games starring the Justice League, such as "Injustice 2" (2017). In a contract dated 1 March 1938, Jerry Siegel and Joe Shuster released the copyright to Superman to their employer, DC Comics (then known as Detective Comics, Inc.) prior to Superman's first publication in April. This was normal practice in the comic magazine industry and they had done the same with their previous published works (Slam Bradley, Doctor Occult,
Adventure Comics adventure series. In issue #12 when the series was titled "New Adventure Comics", Joe Shuster and Jerry Siegel introduced the first version of the character Jor-L as a science fiction detective in the far future; the character would eventually become the alien father of Superman, although the first Superman story, in "Action Comics" #1, would not appear until more than a year after Jor-L's first appearance. The series' focus gradually shifted to superhero stories starting with the debut of the Sandman in issue #40. Other superheroes who appeared in the early days of "Adventure" included Hourman (from #48 to #83);