XCOM Enemy Unknown

XCOM: Enemy Unknown is a turn-based strategy game set in an alternate universe where Earth is under attack by an alien force known as the XCOM. The player takes on the role of a commander tasked with defending human colonies and rescuing captured soldiers.

The gameplay involves managing resources, selecting units, and executing missions to take down enemy strongholds and rescue prisoners. As the game progresses, the player must adapt to changing circumstances and make tough decisions about which battles to fight and which units to sacrifice.