Steve Costigan is a character created by Robert E. Howard. He first appeared in the short story The Pit of the Serpent, first published in the July 1929 issue of Fight Stories.
Crossover chronology[]
| Story | Publication | Crossovers |
| c. 10,000 BC - Rat's Den | Conan #37, February 2007 | see Conan the Barbarian |
| 1913 - Hell Cat of Hong Kong | Risqué Stories #5, March 1987 | see John Gorman |
| 1930 - The Tournament of the Treasure | Tales of the Shadowmen, Volume 9: La Vie en Noir, 2012 | Ace Jessel Moon Man Black Bat Adam Link Tarzan The Monster Men The Maltese Falcon Fu Manchu Fatala Fantômas The Black Coats Doc Savage Sun Koh The Saint Wash Tubbs |
| 1939 - The Breath of Destruction | The Avenger: The Justice Inc. Files, 2011 | see The Avenger |
| 1949 - Madison Square Garden | Night of the Nyctalope, 2012 | see Nyctalope |
Additional crossovers chronology[]
| Story | Publication | Crossovers |
| 1912 - Jimmie Dale Alias the Gray Seal | 2017 novel | see Jimmie Dale |
| Information sourced from The Crossover Universe™ is © copyright 2010-2021 by Win Scott Eckert and Sean Levin. |