Killing Floor 2 is a first-person shooter video game developed and published by Tripwire Interactive. It is a sequel to 2009's Killing Floor and was released for Xbox One in August 2017. Set in Europe, the game follows an outbreak caused by a failed experiment of the biotech firm Horzine. Players must fight through waves of zombie-like creatures, known as Zeds, using a variety of weapons. Featuring cooperative gameplay, players can team up in groups to fend off the hordes, and the game includes a dynamic difficulty system that adjusts to the players' performance.