The film features the highest free fall performed by a stuntman in almost 35 years. The stuntman Damien Walters performed a free fall from the height of 125 feet (38 meters), which lasted almost 3 seconds with a 61 mph impact speed.
Ubisoft gave the prop makers a detailed list of every weapon ever made for the games that they could use as a guide.
The Assassins costumes took 2-3 months to make and were all hand-crafted. There are eight versions of each costume, with an entire costume team devoted to each of the Assassins.