Simmers love to take the worlds that Electronic Arts has given them and remake them in their own image, sometimes rebuilding all the lots in a given world and replacing all the Sims in it. One went as far as to turn the game’s version of San Francisco into a cyberpunk dystopia, with a storyline to match.
Source: Kotaku – Elaborate Sims 4 Mod Turns San Francisco Into (More Of) A Cyberpunk Dystopia