Killzone 3 is a 2011 first-person shooter video game for the PlayStation 3, developed by Guerrilla Games and published by Sony Computer Entertainment. Visari, the leader of the Helghast is dead , but the war is far from over. Helghast forces have mounted a devastating counterattack, prompting the ISA (Interplanetary Strategic Alliance) to smoke out evacuation of planet Helghan. As new Helghast battalions appear, armed with more powerful weapons, ISA forces find themselves outmanned, outgunned and surrounded.