Ikari Warriors are Colonel Ralf Jones and Second Lieutenant Clark Still of the later King of Fighters series (known outside Japan as Paul and Vince in the Ikari series) battling through hordes of enemies. According to designer Keiko Iju, the game was inspired by the popular Rambo films and takes its name from the Japanese title of Rambo: First Blood Part II (Rambo: Ikari no Dasshutsu or "The Furious Escape").[citation needed] Ralf and Clark also make an appearance as playable characters in Metal Slug 6 and Metal Slug 7, as well as the King of Fighters series.