Today Sony PlayStation Europe tweeted that PS4 exclusive Killzone Shadow Fall sold 2.1 Million units worldwide which means about half of the 4.2 million people who picked up a PS4 also grabbed this launch title.
This is a major win for Sony as the Killzone franchise has always been meant to be a major pillar console and this year the franchise landed an incredible attach rate with 50 percent of PS4 owners putting this game on their shelves.
— PlayStation Europe (@PlayStationEU) January 29, 2014
Coincientally the game is on sale at Amazon right now for 40 Dollars. Grab it here.