Modder Koschei has shared a set of mods called Koschei’s Brutalist Merge that can remake the first Watch Dogs. Koschei has combined a variety of mods to create an unrivaled experience.
Ubisoft’s Watch_Dogs was one of the first games to receive a serious downgrade from its E3 demo. This mod brings together some of the most famous ones you can find for it. It includes Source Textures Collection, The Fall of Windy City, and Living City. You’ll also find Enhanced Coat Physics, Realistic Ragdolls + Lethal Takedown, and Enhanced Traffic Diversity.
In short, this mod will rework both the graphics and the game mechanics. You can download it from this link