The franchise previously had a manga
It has been revealed that the famous Ubisoft Franchise “Assasins Creed” is getting a some form of ANime adaptation, although it is unknown in what way or format will be delivered. Adi Shankar (Castlevania) has spoken about it on Facebook.
Assasins Creed is a Video Game franchise made by Ubisoft where one puts on the shoes of a time past Assasin and their war against the Templars on different time periods.
Via: ANMTVLA (Spanish)