Love the Helghast, but hate getting schooled in Killzone's online battlefield? Then you may want to try your hand on a fan-made CCG adaptation, instead. Created by "thepineapple1," the Killzone card game has you dueling one-on-one against another player. With your "Action Points," you'll be able to command and promote soldiers, equip weapons, and even use vehicles. But don't expect to jump into the game immediately. Like many other games in the genre, you'll have to sit down and learn the rules; the downloadable starter kit includes a detailed nine page rule book.
With some patience (and a decent color printer), the Killzone card game looks like a rather interesting diversion. Download the Helghast starer pack here, and the ISA starter pack here.