Players use firearms and improvised weapons, and can use stealth to defend against hostile humans and cannibalistic creatures infected by a mutated fungus in the genus Cordyceps. For the first time in the company's history, Naughty Dog split into two teams; while one team developed Uncharted 3: Drake's Deception, the other half developed The Last of Us. Actors Troy Baker and Ashley Johnson portrayed Joel and Ellie, respectively, through voice and motion capture, and assisted creative director Neil Druckmann with the development of the characters and story. The Last of Us became one of the best-selling video games, selling over 1.3 million units in its first week and 17 million by April 2018. A television adaptation is currently in production by HBO, written by Druckmann and Craig Mazin and starring Pedro Pascal as Joel and Bella Ramsey as Ellie. The Last of Us is an action-adventure game played from a third-person perspective. The player can use firearms, improvised weapons, hand-to-hand combat, and stealth to defend against hostile humans and cannibalistic creatures infected by a mutated strain of the Cordyceps fungus. For most of the game, the player takes control of Joel, a man tasked with escorting a young girl, Ellie, across the United States. The player also controls Ellie throughout the game's winter segment, and briefly controls Joel's daughter Sarah in the opening sequence. In combat, the player can use long-range weapons, such as a rifle, a shotgun, and a bow, and short-range weapons such as a handgun and a short-barreled shotgun. Health can be recharged by finding edible items or through the use of health kits. Though the player can attack enemies directly, they can also use stealth to attack undetected or sneak by them. "Listen Mode" allows the player to locate enemies through a heightened sense of hearing and spatial awareness, indicated as outlines visible through walls and objects. If enemies discover the player, they may take cover or call for assistance, and can take advantage of the player when they are distracted, out of ammunition, or in a fight.