Promotion ends 16/7/2020 at 4:00 PM
https://www.epicgames.com/store/en-US/product/killing-floor-2/home

In KILLING FLOOR 2, players descend into continental Europe after it has been overrun by horrific, murderous clones called Zeds that were created by rogue elements of the Horzine Corporation. 6-player Co-Op & 12-player VS Zed-slaughtering mayhem.

Free for a Limited Time at Epic Games Store

https://www.epicgames.com/store/en-US/product/killing-floor-2/home

Source: Killing Floor 2