The Battle Begins With Nightfall It's 2091 and megacorp Horzine has produced the ultimate army: an obedient horde of bioengineered monstrosities called zeds. Now, only the rebel group Nightfall stands between these infernal creations and the future of humanity. Killing Floor 3 is the next installment in the legendary action/horror series. This intense FPS puts you in the boots of a Nightfall specialist joining forces with up to five teammates to battle waves of zeds, earn dosh, unlock skills, and build the ultimate arsenal.