XCOM Enemy Unknown is a turn-based tactical video game developed by Firaxis Games and published by 2K Games. The game's campaign begins in the spring of 2015, as a global alien invasion begins. Prior to the start of the game, a group of countries called the Council of Nations has banded together to create XCOM, the most elite military and scientific organization in human history, tasked with defending them from the alien attack. The player assumes the role of the commander of XCOM, and proceeds to engage in a war against an extraterrestrial enemy with overwhelming technological superiority.

• XCOM Enemy Unknown