 “Shadows & Light” served as a prequel to the bestselling video games for the Xbox and PC, and featured Dustin Weaver on pencils.Since then, Ortega has written for several major American comic book publishers, including Marvel Comics, DC Comics, Dark Horse Comics, TOKYOPOP, Image Comics, Top Cow Productions, and Speakeasy Comics, working on characters and properties such as "Star Wars", "Batman", "Spider-Man", "Star Trek", Michael Chabon’s "The Escapist", Beowulf, and his own co-creation, "The Necromancer", penciled and co-created by Francis Manapul.Joshua is also being credited as a writer for Epic Games' "Gears of War 2" as well scripting the "Gears of War" comic books.