#GhostRoboArmy for life!. This review copy of Uncharted 4 was provided by PlayStation. Three years after the events of Uncharted 3: Drake's Deception, Nathan "Nate" Drake, now retired as a fortune hunter, has settled into a normal life with his wife Elena Fisher. His world is then turned upside down when his older brother Sam, long believed to be dead, suddenly reappears seeking Drake's help. Along with Victor "Sully" Sullivan, they embark on a race against time, across the globe, from the snow-capped peaks of Scotland to the island nation of Madagascar, in pursuit of a conspiracy behind Libertalia, a long lost pirate colony, and its fabled pooled pirate treasure. Nate must also contend with rival treasure hunter Rafe Adler, who has hired mercenary Nadine Ross, and her private military corporation, Shoreline to help him locate Libertalia. Naughty Dog outlined the game's plot as "his greatest adventure yet and will test his physical limits, his resolve, and ultimately, what he's willing to sacrifice to save the ones he loves". Uncharted 4: A Thief's End is an action-adventure game played from a third-person perspective. It also includes elements commonly found in platform games. The player assumes control of Nathan Drake, who is physically adept and is able to jump, sprint, climb, swim, scale narrow ledges and wall-faces to get between points, swing with a rope, use a grappling hook and perform other acrobatic actions. Drake can use various firearms such as assault rifles, pistols and grenades to kill enemies. Stealth elements are incorporated into the game, allowing the player to sneak behind enemies and kill them without being noticed. The melee combat system was reworked to avoid the presence of quick time events. Drake also gains the ability of controlling vehicles directly. While the game is linear, environments feature multiple paths for the player to explore. Maps are also significantly larger than the previous games in the franchise, with the explorable area being 10 times larger than the previous games. The artificial intelligence (AI) of enemies was enhanced. They are now able to respond to the player's actions more responsively, coordinate tactics, and cooperate with each other. The AI of Drake's companions, including Sam and Sully, were improved and will assist Nathan in combat situations, though the player can not directly command them. A dialogue tree is introduced, though it does not affect the story's progression. The transition between cutscene and gameplay sequences has been described as "seamless". Extra visual filters and modes, such as a zero-gravity mode, bullet time gameplay, and a cel-shaded artstyle, can be unlocked by using points players collected in the main game. Competitive multiplayer is featured in the game. Players play as different characters in the series, and are tasked to defeat their opponents. Treasures can be found in all maps, which can be used to purchase new items and weapons. Multiplayer features "Mysticals", supernatural power-ups that boost players' ability. For example, the "Wrath of El Dorado" kills all opponents standing next to it, while the "Cintamani Stone" can heal both players and their teammates. Sidekicks are AI-controlled companions that can be summoned to assist players. The Hunter can hunt its closest opponent, the Savior can provide medical support and ammo to players, the Sniper can defeat opponents through the use of sniper rifles, and the Brute can defeat enemies using heavy firearms. Plunder mode also returns, thought it was scaled back to support only eight players. According to Naughty Dog, vehicles for the competitive multiplayer modes, and a cooperative multiplayer mode, could be introduced after the game's launch..