Players can play with friends or strangers by playing in the same [[region]].
*==Region==: ''Main article: [[Region]]''Region is where multi-city play occurs. Up to 16 players cities can play exist in one a region. These cities can be controlled by an individual player or [[multiplayer|multiple players]].
Players Cities in the same a region directly affect interact with one another through the spread of pollution or sharing of [[service]]s.
*One city can negatively affect another by spreading its pollution or criminals.
Players can create a private or public region.
*In a private region, only the player and his or her friends can join. *In a , while in public region, anyone can join. ==Region==: ''Main article: [[Region]]''
==Global Market==