Lens of Truth writes, "If you haven't heard, Killzone 2 will be sporting some ultra violent head shots. We got to sample a bit of the carnage in the demo. What really looks cool is the character reactions when they get tagged in the head. Sometimes they take a few staggering steps then fall, other times they are instantly brought to their knees. But not all weapons will have this effect on the Helgiest, only certain high powered weapons such as the STA14 single shot rifle."