Civilization is a series of turn-based strategy video games, first released in 1991. Sid Meier developed the first game in the series and has had creative input for most of the rest. The main Civilization games are turn-based 4X games, where players attempt to achieve one of several victory conditions against other human and computer-controlled opponents through the actions of "eXplore, eXpand, eXploit, and eXterminate". Players either select or are randomly assigned a civilization led by a historical figure, based on several factual reigns and empires, including the Romans, Aztecs, and Americans; the civilization choice provides certain unique bonuses, units, and improvements for that player.
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