New Goals for the DLC
The City Economic Simulation DLC has the following new goals:
Build a New City Goal
If you start a new game with the Developed City at the Beginning option disabled, you will be given a goal for building a new city as shown in the below screenshot.
City Goal for Reaching a Population Target
If you start a new game with the Developed City at the Beginning option enabled or you have built a new city in the game, you will be given a goal for reaching a population target, like the following screenshot shows.
Your city will receive cash rewards when the goal is achieved.