Following March’s seasonal update, Killing Floor 3 has its fourth seasonal update, “Operation: Shadow Hunter” , available now for free for a limited time on PC via Steam and Epic Games Store, the PlayStation 5 and the XBOX Series. And to celebrate the game’s first anniversary since its launch, Tripwire Interactive has made Killing Floor 3 free-to-play for a limited time on all platforms from July 23 through July 27.

Operation: Shadow Hunter sees Nightfall specialists venture to the Nordic North Sea to explore a mire-infested oil rig and the horrors it has unleashed. Joining the team to explore the new map is the highly-anticipated 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. Players can also expect a Supply Pass refresh with free and paid tracks, performance optimizations, new achievements, quality of life improvements and more.

As for the free-to-play period, new players will have access to the full game, including the latest seasonal update, and all other updates including the recently added Onslaught map and text chat support. All progress will be saved and available after purchasing the game, with all three editions and Seasonal DLC Passes on all platforms discounted 50% off their regular price.

Tripwire also revealed the latest roadmap for Killing Floor 3, detailing the content ahead, including the return of popular seasonal events and a first look at plans for mod support across all platforms.