In April 2019, Ubisoft offered Assassin's Creed Unity for free on PC to allow players to experience the virtual reconstruction of the Notre Dame Cathedral following the historical fire.
Due to technical issues at launch, Ubisoft made the "Dead Kings" DLC free for all players permanently and offered a free game to Season Pass holders as an apology. Update 1.5.0 Key Features Assassin’s Creed Unity Free Download (v1.5.0 & ...
Legitimate free access to the full game occurred during a specific window: In April 2019, Ubisoft offered Assassin's Creed Unity
Patch 1.5.0 focused primarily on final stability and performance refinements: In April 2019