Check out the latest Killing Floor 3 trailer for the action shooter game to see what to expect with Season 4's Operation: Shadow Hunter, which brings a new map, Gunslinger perk, the new boss Dr. Moocroft, and a new difficulty level. Killing Floor 3 is available now on PC (via Steam and Epic Games Store), PlayStation 5 (PS5), and Xbox Series X/S. It is also free-to-play for a limited time from July 23 to July 27, 2026.Season 4 of Killing Floor 3 sees Nightfall specialists venture to the Nordic North Sea to explore a mire-infested oil rig and the horrors it has unleashed. The Season 4 update also adds the Gunslinger perk, which includes an armory of dual-wielded pistols and high-tech gadgets for dispatching Zeds and the second phase of dual-wield support for the remaining sidearms. The update also introduces the elusive Dr. Moorcroft as a new boss and adds a ‘Suicidal’ difficulty level, giving players a challenge between ‘Hard’ and ‘Hell-on-Earth” currently in-game. Additionally, there will be a Supply Pass refresh with free and paid tracks, performance optimizations, new achievements, quality of life improvements and more.