20th Century Fox has released a new Assassin’s Creed featurette. Directed by Justin Kurzel (Macbeth), the film is an adaptation of the popular video game franchise and stars Michael Fassbender as death row inmate Callum Lynch, who is whisked away to a mysterious facility run by Abstergo. There, he enters a device called the “Animus” where he is forced to live out past memories from his 15th century Spanish ancestor Aguilar in the hopes of discovering the location of a lost but important object.

Earlier this year, we got the CGI-heavy video game adaptation with Warcraft, and Assassin’s Creed looks to be going in the opposite direction. While there will certainly be CG, this featurette stresses the importance of the practical effects, especially in the parkour scenes that fans will be watching closely since free-running is such a huge element of the games. It’s clear that everyone is doing their best to do it right, but will that be enough?

Check out the Assassin’s Creed featurette below. and for much more on the film, check out Adam’s full set visit report including 35 things to know and his on-set interviews with Fassbender and Kurzel.  The film opens December 21st and also stars Marion Cotillard, Jeremy Irons, Brendan Gleeson, and Michael K. Williams.

Here’s the official synopsis for Assassin’s Creed:

Through a revolutionary technology that unlocks his genetic memories, Callum Lynch (Michael Fassbender) experiences the adventures of his ancestor, Aguilar, in 15th Century Spain. Callum discovers he is descended from a mysterious secret society, the Assassins, and amasses incredible knowledge and skills to take on the oppressive and powerful Templar organization in the present day. ASSASSIN’S CREED stars Academy Award nominee Michael Fassbender (X-Men: Days of Future Past, 12 Years a Slave) and Academy Award winner Marion Cotillard (The Dark Knight Rises, La Vie en Rose). The film is directed by Justin Kurzel (Snowtown, Macbeth); produced by New Regency, Ubisoft Motion Pictures, DMC Films and Kennedy/Marshall; co-financed by RatPac Entertainment and Alpha Pictures; and distributed by 20th Century Fox . ASSASSIN’S CREED opens in theaters worldwide on December 21st, 2016.