Sim Settlements 2 took all the best parts of the add ons and expansions, simplified the complicated parts, sped up all the scripts, and most importantly, wrapped every game play mechanic in fully voiced questlines, which act as tutorials and gradually introduce the player to important Sim Settlements concepts. As well as hundreds of amazing new buildings. Of course, the community added a bunch of incredible add ons over the years, including some important new game mechanics like automated provisioner networks, and scrap collection beacons. And Conqueror added a conquest mechanic, and factions. Industrial Revolution added a complex tech tree and plenty of fun advanced industrial plots. Rise of the Commonwealth added the ability to appoint mayors and made city building almost entirely hands off, if that's what you wanted. Sim Settlements 1 was a great mod, making settlement building easy and fun. This is, no lie, the best mod made for any game, ever.