Sony sells 2.1 million copies of its PS4 shooter Killzone: Shadow Fall

A huge number of people who picked up a PlayStation 4 also invested in a zone for killing.

Sony Computer Entertainment revealed today that it has sold 2.1 million copies of its PlayStation 4 sci-fi shooter Killzone: Shadow Fall. The game reached that milestone as of Jan. 15. Earlier this month, Sony confirmed it sold 4.2 million PlayStation 4s around the globe before the end of 2013.