It is the year 2084. You control a secret organization charged with defending Earth from a brutal alien enemy. Build up your bases, prepare your soldiers, and lead them to victory in turn-based tactical combat.
UFO: Alien Invasion has released 2.3.1. This release is a bug fix for the stable 2.3 release and maintains compatibility for all saved games under 2.3. It includes dozens of fixes to small bugs throughout the game.