Killing Floor 2 is an online horror game that is specifically designed for dedicated servers, making it difficult to create your own game or lobby.
Killing Floor 2: How to start a private game?
The game has been updated so many times since it was first released that it can be confusing to know what to do. So how exactly does it work so that you can play with your friends wherever you are?
In Killing Floor 2 there is no option to host a server and have your friends join. You can still join matchmaking with friends by starting a private game.
You can add your friends to the lobby through the in-game menu, but if they want to enter the lobby while they are in the game, they will need to enter the password you created to join.