Two years after the Helghast assault on Vekta, the ISA launched an assault on the enemy's home world of Helghan. The ISA goal is to capture the Helghast leader, Emperor Visari, and bring the Helghast war machine to a halt.
Mathijs de Jonge,
After awakening from a nine year coma, Big Boss forms a new mercenary group called, Diamond Dogs, and teams up with his former rival, Ocelot, to track down the men responsible for the destruction of MSF.
Robin Atkin Downes,
Following the events after Killzone 2 (2009), 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 to smoke out evacuation of planet Helghan.