Killzone: Liberation

The Helghast have been dealt a hefty blow from the last game, but the war is far from over. The enemy still controls large parts of the planet Vekta, and though the ISA armies are fighting hard, they are losing ground. The rules of war have been cast aside with the sadistic Helghast General Armin Metrac, employed by the Helghast Emperor Scolar Visari to use brutal measures in order to seize the initiative after their past defeat and strengthen his position further. (wikipedia.org)