2K Games then acquired the license to the franchise in 2007, leading to the new rebooted series starting with XCOM: Enemy Unknown in 2012.
X-COM then laid dormant after a couple canceled sequels leading up to the divisive X-COM: Defender, the last game in the first franchise run. The (then) X-COM franchise was known for its difficulty and turn-based tactical combat and released titles until 2001.
The first series of XCOM games were originally released in PC starting in 1994 with X-COM: UFO Defense.
