Valve has announced that Cities XL 2011, the enriched version of Cities XL, has been launched via Steam. With Cities XL 2011, you will build and develop gigantic cities on realistic 3D maps, thanks to a collection counting more than 700 buildings and unique structures. You are the virtual mayor and as such, you will need to find the right balance between economic development for your city, public transportation, housing, social services, leisure activities and even special events in town.