Sid Meier's Civilization V/Civilizations

There are a total of 18 civilizations, 6 more obtained from DLC and 10 from the Gods and Kings expansion. Unlike past installments of the series, each civilization no longer has general traits, but they do gain a Unique Ability that makes each civ more different from the others. Each also have a Unique Unit for and either a second Unique Unit or a Unique Building.

Core and DLC Civilizations
1Sid Meier's Civilization V: Babylon (Nebuchadnezzar II) DLC 2Civilization and Scenario Pack: Denmark – The Vikings DLC 3Double Civilization and Scenario Pack: Spain and Inca (note that Spain is also included in the Gods & Kings expansion) 4Civilization and Scenario Pack: Korea DLC 5Civilization and Scenario Pack: Mongolia DLC 6Civilization and Scenario Pack: Polynesia DLC