Assassin's Creed Uniti can be downloaded free of charge from the Ubisoft site. The French company decided to make available to everyone the chapter of the saga set up in Paris, to remember Notre-Dame before the reluctant fire.
According to what is described on the site, Ubisoft's will is to remind everyone of the beauty and majesty of the Paris cathedralespecially for people who unfortunately can no longer see the cathedral in its true splendor.
Assassin's Creed Uniti for PC is free download here. Ubisoft emphasized the desire to help reconstruct Notre-Dame, if you want to participate in the reconstruction, you can make a donation for Ubisoft.