This 2007 main game is a non-linear action-adventure where you play as Altaïr, a 12th-century Assassin during the Third Crusade, reliving his memories via the Animus. The core loop involves stealth, social blending, and acrobatic free-running across historical cities like Jerusalem and Damascus to eliminate key Templar targets. Its unique feature is the dual narrative, contrasting medieval espionage with a modern-day science fiction conspiracy. The game established foundational mechanics for open-world traversal and historical fiction blending.
The game masterfully alternates between two distinct timelines. The primary focus is on Altaïr's missions across historical cities like Jerusalem, Acre, and Damascus. Here, the atmosphere is rich with the tension of the Crusades, where Christian Crusaders and Saracen forces vie for control. Altaïr is tasked with eliminating key historical figures connected to the Knights Templar, learning the intricate web of conspiracy that underpins the conflict.
Interspersed with these historical sequences are segments featuring Desmond Miles in a modern-day research facility. These transitions serve to advance the overarching science fiction plot concerning the secretive organization utilizing the Animus, providing context for the historical events being witnessed.
The gameplay loop revolves around stealth, social infiltration, and acrobatic movement. Players must navigate dense, open-world city environments, utilizing the architecture for vertical exploration. A key mechanic involves blending into crowds and using stealth to approach targets undetected, adhering to the tenets of the Assassin Brotherhood.
Combat is present but often serves as a consequence of failed stealth. The game emphasizes precise timing and counter-attacks when direct confrontation becomes unavoidable. The atmosphere is defined by the contrast between the sun-drenched, politically charged medieval Middle East and the sterile, high-tech environment of the modern laboratory.
The most distinguishing feature is the integration of historical figures and settings into a compelling, fictionalized conflict between Assassins and Templars. The unique traversal system, emphasizing free-running across rooftops and structures, established a new standard for environmental interaction in open-world games. Furthermore, the framing device of reliving genetic memories through the Animus provides a novel approach to storytelling within the action-adventure genre.
This main title was released without any downloadable content (DLC) or expansions.
The content of this game is suitable for persons aged 18 years and over only. It contains: Extreme violence - Violence towards defenceless people
Strong violence

Assassin's Creed is a non-linear action-adventure video game, during which the player controls a 12th-century Levantine Assassin named Altaïr Ibn-La'Ahad during the Third Crusade, whose life is experienced through the Animus by his 21st century descendant, Desmond Miles. The Director's Cut Edition features four PC-exclusive memories, including the Rooftop Race Challenge, the Archer Stealth Assassination Challenge, Merchant Stand Destruction and Informant Escort Challenge.

Assassin's Creed is a mobile game made by Gameloft, a sister company of Ubisoft, that was released in 2007, alongside the main game. The game featured Altaïr Ibn-La'Ahad in the Third Crusade as he tried to redeem his honor.