Sid Meier's Civilization V: Gods & Kings
It features the introduction of religion as a major gameplay component to the game, through a faith-based mechanism
Sid Meier's Civilization V: Gods and Kings is the first official expansion pack for the Turn-Based Strategy game, Sid Meier's Civilization V.* . It also adds additional diplomatic abilities to those found in the base game. Additional features include, a variety of benefit types for the establishment and adoption of religion, spies that both level with mission completion and that can be a liability if captured, several new playable civilizations, improved battle abilities, and new units, buildings and wonders.