This page is our investigation of cross-play feature in game called Killing Floor 3. We also want to mention that - we always put manual efforts to find the precise, valid, and what is more important official information about different game features without using AI.
Games can have different cross-play combinations, for example the game can have cross-play between PC, Playstation 5, Xbox X|S, but not between old generations like: Xbox One, Playstation 4, PC. To avoid any misinterpretations, we group them into so called "cross-play variations".
Any store inside the cross-play variation have a cross-play only with a store in the SAME variation. We also want to notice, that we put into variation not platform, but store + platform. That is required because some games, for example, can have cross-play between a Playstation 5 and Steam, but not Playstation 5 and Epic Games.
Killing Floor 3 (KF3) will have cross-play support between all platforms at release, as well as during the beta. Players on PlayStation 5, Xbox X|S, and PC (Steam, Epic Games Store) will be able to play together without any issues.
The first source of truth is an article from the official Killing Floor 3 website about its first planned release in March 2025, which didn't happen. You can check it here.
It is also mentioned on the Killing Floor 3 Steam page here.
We can also verify that the game has cross-play support, because we had the ability to play the pre-release game version.