The events of Killzone Shadow Fall take place thirty years after the events of Killzone 3. Set in a time of planetary colonization, the game focuses on the conflict between the Vektans and the Helghast, two rival colonist factions inhabiting a remote planet. For 3 decades, both factions have lived side by side, separated by an enormous security wall – but now their cold war is about to run hot. It is up to Lucas Kellan, a member of the military intelligence unit dubbed the Shadow Marshals, to try to protect the fragile peace that exists. A new warrior for a new era of war, Kellan 's missions will range from quiet infiltrations to all-out combat. Lucas will need to be methodical and ready to adapt, as any misstep could lead to mutually assured destruction.