Call of Duty 4: Modern Warfare is a 2007 first-person shooter video game, developed by Infinity Ward and published by Activision for Microsoft Windows, Mac OS X, PlayStation 3, Xbox 360 and Wii. A handheld game was made for the Nintendo DS. The game was released in North America, Australia, and Europe in November 2007 for video game consoles and Microsoft Windows. It was released for the Mac in September 2008, then released for the Wii in November 2009, given the subtitle Reflex Edition. It is the fourth installment in the Call of Duty video game series, excluding expansion packs, and is the first in the Modern Warfare line of the franchise, followed by a direct sequel, Call of Duty: Modern Warfare 2 as well as the first game in the series to have a Mature rating. The game breaks away from the World War II setting of previous games in the series and is instead set in modern times. Developed for over two years, the game uses a proprietary game engine. On September 10, 2009, it was re-released in Japan by Square Enix.
Call of Duty: World at War is a 2008 first-person shooter video game developed by Treyarch and published by Activision Blizzard for PC, PlayStation 3, Wii, and Xbox 360. It is generally considered to be the fifth mainstream game of the Call of Duty series and returns the setting to World War II. The game was released in North America on November 11, 2008, and in Europe on November 14, 2008. A Windows Mobile version was also made available by Glu Mobile and different storyline versions for the Nintendo DS and PlayStation 2 were also produced, but remain in the World War II setting. The game is based on an enhanced version of the Call of Duty 4: Modern Warfare game engine developed by Infinity Ward with increased development on audio and visual effects.
Call of Duty: Finest Hour is a 2004 first-person shooter video game. It was released for the GameCube, PlayStation 2, and Xbox on November 16, 2004 in North America. It was the first console installment of Call of Duty, developed by Spark Unlimited and published by Activision. It was followed up by a sequel, Call of Duty 2: Big Red One, in 2005. The game runs on the RenderWare engine.
Samples taken from Desmond Miles' body in the moments after his death have enabled Abstergo Industries to continue to explore his genetic memories using the Animus' newfound cloud computing abilities. The unnamed player character is hired by Abstergo's entertainment division to sift through the memories of Edward Kenway, an eighteenth-century pirate and the grandfather of Connor. Ostensibly, this is to gather material for an Animus-powered interactive feature film, but in reality, Abstergo and the Templars are searching for the Observatory, a Precursor structure that allows the user to see through the eyes of a subject. As Kenway, the player must unravel a conspiracy between high-ranking Templars to manipulate the British, Spanish and French empires into locating the Sage - later identified as Bartholomew Roberts - who is the only man who can lead them to the Observatory.
Desmond and his allies arrive at the Temple entrance in a cave in the New York area on October 31, 2012, and open its door using the Apple Of Eden, discovering a larger chamber of Precursor technology behind it, including another door requiring a key. Desmond suddenly falls into a fugue state, and is put into the Animus. There, he experiences the memories of a half Mohawk, half British man named Ratonhnhaké:ton (/ˈrəduːnˈhəɡeɪduːn/; "Ra-doon-ha-kay-doon"),[7] later dubbed Connor (Achilles calls him this in memory of his dead son), who lived through the American Revolution, as well as Connor's father, Haytham Kenway, who is later revealed as a British agent of the Templars. Kenway had gone to the Colonies in America with a stolen medallion, recruited Templar allies including Charles Lee, and worked to gain the trust of the Mohawk people to get them to show him the location of the Temple, but to his annoyance, the medallion did not open the Temple for him. 
Desmond comes to consciousness in a virtual area within the Animus, the Animus Island, where he meets the digital personality of Subject 16. Subject 16 explains that from the trauma of stabbing Lucy, Desmond must complete the memories of both Altaïr and Ezio to be able to separate his mind from theirs and to allow him to come out of his coma; however, doing so will destabilize the island as the Animus recovers that memory segment and at one point Subject 16 sacrifices himself to allow Desmond to continue. Desmond rejoins Ezio's story many years after Brotherhood, where Ezio is curious to the Assassin's origins and has traveled to Masyaf to locate their original headquarters. He finds Altaïr's library, though it is locked by five keys which the Templars are also seeking, believing there to be great power within it.
Lucy returns and breaks Desmond out of Abstergo, taking him to an Assassin safehouse and introduced to Shaun, a historian, and Rebecca, their technical support. Using an improved version of the Animus, Desmond takes witness to Ezio Auditore da Firenze, a young nobleman from the late 15th Century in Florence, shortly before the execution of Ezio's father and brothers by order of a corrupt official working for the Templars. He and his mother and sister take to hiding at the Monteriggioni villa owned by his uncle Mario, who helps to train Ezio in the ways of an Assassin. Ezio and Mario discover that Rodrigo Borgia is the figurehead of a number of Templars all who were accomplices in the execution of his family, and with help of allies like Leonardo da Vinci, methodically assassinate the lower ranked Templars, while learning that Borgia has acquired a Piece of Eden called the Apple. Eventually, Ezio corners Borgia, who hands over the Piece and flees; Ezio is inducted into the ranks of the Brotherhood and believed to be a prophet based on their codex.
Desmond is captured by Abstergo and forced to use a machine called the Animus to explore Altaïr ibn-La'Ahad's memories during the time of the Third Crusade. Desmond begins to witness events after Altaïr breaks all three tenets of the Assassin Brotherhood while attempting to stop Robert de Sablé from taking a Piece of Eden. Al Mualim, the Brotherhood's leader, demotes Altaïr to Novice and tasks him with assassinating the nine Knights Templars, including de Sablé, to regain his former status. Altaïr's quest eventually leads him to face de Sablé in the presence of King Richard I of England warning the King of de Sablé's plot to kill him. Altaïr defeats de Sablé, but with his last words, de Sablé reveals that there were ten Templars, the last being Al Mualim, who now holds the Piece of Eden. Altaïr returns to face Al Mualim, struggling to fight through the illusions created by the Piece, but eventually kills Al Mualim. When Altaïr recovers the piece, he and those watching the Animus witness a holographic map showing locations across the globe where other artifacts are located. Desmond is pulled from the Animus, and was going to be killed, but his life is spared by Lucy Stillman, an Assassin working as a mole within Abstergo, as she claims they might need to further examine his memories later. He comes to learn that a former test subject had left messages only Desmond can see, foretelling of the end of the world in 2012.
