According to various leaks and reports, the game started out as an expansion for Valhalla and was intended to be more akin to older games in the series, featuring a smaller setting and a bigger focus on stealth gameplay. Désilets wanted to move away from the lead character being a prince simply waiting for his reign to start, but a character that wanted to strive to be a king. In the present-day, the player character is a player of Helix, an Animus-powered gaming device produced by Abstergo, who hope to use their unaware player base to locate more Pieces of Eden. Finally, Ubisoft Montreal completely reworked the repetitive mission structure from the first game through numerous side activities, collectibles, and secrets. Shay's story is set between the events of Assassin's Creed IV: Black Flag and Assassin's Creed III, and is meant to fill the gaps between their respective narratives, while also having "a crucial link to the Kenway saga" according to Ubisoft, as well as to Assassin's Creed Unity.

In most games, players control a historical Assassin while also playing as an Assassin Initiate or someone caught in the Assassin–Templar conflict in the present-day framing story. The Assassins are ultimately forced to go underground once more, and the player character is invited to join the Templars. Assassin's Creed III originated from both Ubisoft Montreal, who wanted to progress the series' narrative forward in time, and to an unattached project that had been developed at Ubisoft Singapore and featured naval ship combat.Originally Revelations was announced as Assassin's Creed: Lost Legacy, and conceptualized as a Nintendo 3DS title focusing on Ezio traveling to Masyaf to explore Altaïr's legacy and uncover the origins of the Assassin Brotherhood. While still awarding the game decent scores, several publications cited a number of significant shortcomings. The Assassin was named Altaïr, meaning "bird of prey" in Arabic, and eagle imagery was used heavily in connection to the Assassins. The first two games to be included in Infinity will be Assassin's Creed: Codename Red, set in Feudal Japan, [9] and Assassin's Creed: Codename Hexe, rumoured to be set in Central Europe during the 16th century. The development team counters that with a new generation of consoles, they could potentially make it a new intellectual property.

The modern-day narrative again follows Desmond, who escapes from Abstergo (revealed at the end of the previous game as a front for the modern-day Templars) with the aid of Assassin mole Lucy Stillman and is taken to her team's hideout.The main story is set during the Peloponnesian War between Athens and Sparta, at the height of Classical Greece. s mixed review for Electronic Gaming Monthly, he wrote that the game features "a challenging parkour path of escape", and while intriguing, it is "an incomplete template based on multiple other games". Majd Addin ( Richard Cansino; based on Baha ad-Din ibn Shaddad), a tyrant who rules Jerusalem through fear by holding public executions.

At various points during their playthrough, the player is contacted by the hacking collective Erudito, who helps them uncensor the game to learn the true nature of the events depicted. Through the Animus interface, the player can retry any past mission already completed; for example, in Assassin's Creed: Brotherhood, the player achieves better synchronization results by performing the mission in a specific manner, such as by only killing the mission's target.A video showed an extended version of the E3 demo and included Altaïr trying to escape after assassinating of Talal, the slave trader. It was the last game to feature Assassin's Creed creator Patrice Désilets, as the creative director of the series. The combat system allows for a number of unique weapons, armor, and moves, including the use of a hidden blade set in a bracer on the Assassin's arm, which can be used to perform surreptitious assassinations. To achieve this goal, the player must travel from the Brotherhood's headquarters in Masyaf, across the terrain of the Holy Land known as the Kingdom, where the player can freely ride a horse, [7] to one of three cities— Jerusalem, Acre, or Damascus—to find the Brotherhood agent in that city. The main narrative takes place during the Seven Years' War, [30] and follows Shay, who starts out as a talented, but insubordinate Assassin trainee.

In Assassin's Creed Odyssey, Layla recovers the Spear of Leonidas, from which she extracts the DNA of Leonidas' grandchildren, Alexios and Kassandra.Assassin's Creed IV: Black Flag 's director Ashraf Ismail, commented on an interview that he and the team would be interested in doing an Assassin's Creed game in an Ancient Egyptian setting, along with reiterating an earlier statement that a female leading character was not an impossibility for the series. While the song "The Chosen (Assassin's Creed)" by Intwine featuring Brainpower was made contributing to the game, it was not featured in the game nor its soundtrack. The main story is set in Victorian era London and follows twin assassins Jacob and Evie Frye, as they navigate the corridors of organized crime to take back the city from Templar control and prevent them from finding the Shroud.