X-COM (sometimes stylized as X-Com) is a science fiction video game franchise featuring the titular fictional elite international organization tasked with countering alien invasions of Earth. The series began with the hit strategy video game UFO: Enemy Unknown created by Mythos Games and MicroProse in 1994. The original line up by MicroProse included six published and at least two cancelled games, as well as two novels. The X-COM series, in particular its original entry, achieved a sizable cult following and has also influenced many other video games; including creation of a number of clones, spiritual successors, and unofficial remakes. A reboot series entitled XCOM was published by 2K Games, beginning with the strategy video game XCOM: Enemy Unknown, developed by Firaxis Games and released in 2012 to critical and commercial success, with two more games following in 2013.