SimCity 4 is a city-building simultor. You are in the shoes of one or several mayors, and you are tasked with populating and managing your cities.When you have chosen a segment to place your city in, you will be able to chose between 3 game modes.

God mode: This mode lets you shape the overall landscapes as you desire
Mayor mode: In this mode you build and manage your own cities.
My Sim mode: Here the player can choose his own Sims and have them move into the city, or import saved games from the game The Sims.