Lost: The Child Murders at Robin Hood Hills (1996) and its sequels Revelations (2000) and Purgatory (2011), and found it particularly interesting when parents would make comments in interviews about wanting to hurt or kill the West Memphis Three over the murder allegations; he felt that these comments were the "perversion of love", wanting to commit a heinous act to bring justice for those they love. He also referenced Dave Grossman's 1996 book On Killing, which discusses the desensitization of violence for soldiers. Druckmann noted that the game's other themes include tribalism, trauma, and the pursuit of justice. He felt that humans often dehumanize those they oppose in order to justify their own actions in the chase for justice; he found this particularly relevant in modern politics and online discourse, and wanted to explore it within the game without being overly "preachy". Gross added that "one man's justice is another man's revenge" and wanted the story to show different perspectives and consequences. Druckmann felt that the depiction of violent acts was necessary in a story that deals with the cycle of violence, but welcomed members of the team to work on other elements of the game if anything made them uncomfortable. Co-art director John Sweeney pushed for realism in the violence, particularly with minimizing it instead of embellishing. The inclusion of a PlayStation Vita playing Hotline Miami (2012), a game with similar themes about violence of which Druckmann and the team are fans, was considered an extension of the theme; earlier versions used another Naughty Dog game, but Dennaton Games allowed the team to use Hotline Miami. Cambier noted that Ellie's violent acts are committed for love or for hate, and were therefore justified by the narrative. The game underwent several changes throughout production. Initial pre-production concepts included Ellie discovering information about other immune people. Later in development, the game had five days in Seattle instead of three, including an additional side story wherein Ellie traveled to the Seraphite island, which was intended to humanize the Seraphite characters more. An earlier version of the farm sequence featured a playable sequence of Ellie hunting a boar; gameplay, art, and performance was completed, but the sequence was cut for pacing purposes and is instead referenced in Ellie's journal. In an earlier draft, Joel had a girlfriend named Esther, who was originally mentioned as part of a live performance of some scenes from