The Killzone series has been important to Sony and its PlayStation line. The first arrived on PlayStation 2, almost as an answer to Microsoft and Bungie's Halo for the original Xbox, and there have been iterations for every subsequent console, including the PSP and PS Vita.
Absolutely gorgeous visuals - the best-looking game on the PS4 at launch by far; multiplayer is great fun; a good variety of gameplay styles
Pedestrian single-player campaign that is good but not spectacular; over-use of lens flare effects to criminal levels