Sid Meier's Civilization V is a 4X video game in the Civilization series developed by Firaxis Games. The game was released on Microsoft Windows on September 21, 2010, on OS X on November 23, 2010, and on Linux on June 10, 2014.

4X is a subgenre of strategy-based computer and board games, and includes both turn-based and real-time strategy titles. The gameplay generally involves building an empire. Emphasis is placed upon economic and technological development, as well as a range of military and non-military routes to supremacy.