1UP writes: " I actually reviewed the original Killzone, and from my quick spin through some of the single-player, the safe thing to say is that Killzone 2 reskins the original with more "bang-bang-boom-boom!" aesthetics and fewer technical holdbacks.

Killzone was essentially Medal of Honor/Call of Duty but with space Nazis, meaning an intense cinematic depiction of warfare with a sci-fi sheen -- think Saving Private Ryan where Spielberg digitally replaces Allies and Nazis with ISA and Helghast. Killzone 2 preserves this tone while serving up production values that do manage to hit the fabled target render video from 2005 -- all with a consistent framerate (my biggest annoyance with the original)."