Indiana Jones Chronicles" explains how Indiana becomes solitary and less idealistic following his service in World War I. In "Indiana Jones and the Kingdom of the Crystal Skull", Jones is older and wiser, whereas his sidekicks Mutt and Mac are youthfully arrogant and greedy, respectively. Indiana Jones is modeled after the strong-jawed heroes of the matinée serials and pulp magazines that George Lucas and Steven Spielberg enjoyed in their childhoods (such as the Republic Pictures serials, and the Doc Savage series). Sir H. Rider Haggard's safari guide/big game hunter Allan Quatermain of "King Solomon's Mines", who dates back to 1885, is a
Indiana Jones and the Iron Phoenix was featured as a central villain. After this game, LucasArts briefly considered making a game named "Spear of Destiny" (involving the spear of Longinus). They eventually abandoned the idea of creating a classical adventure game in the "Indiana Jones" series, instead focusing on "Tomb Raider"-style 3D action games. Thus, ending it with the release of "Indiana Jones and the Infernal Machine", followed by "Indiana Jones and the Emperor's Tomb" and "Indiana Jones and the Staff of Kings". Since the game, "Indiana Jones and the Iron Phoenix" was canceled, Dark Horse Comics released a four-part comic book series based upon it.