In the film, the 39-year-old Irish actor plays career criminal, who is forced to relive the memories of his ancestor, Aguilar de Nerha, an Assassin during the time of the Spanish Inquisition.
Speaking about what drew him to the role, Fassbender told Contactmusic, "This universe of Templars and Assassins and the idea of DNA memory and how we carry our ancestors lives with us in our DNA, that seemed to me immediately fascinating.
The "Assassin's Creed" movie takes the universe of the video game franchise and brings it to the present day, with Fassbender's character being specially created for the film.
Discussing how they decided on creating the character of Lynch, Fassbender said, "We wanted to bring something fresh and new in terms of introducing new characters and then it really was just about trying to find where those characters have come from and where they were going.