Re installing steam is not a solution with this specific problem its the same as saying re install windows.
Killing floor problema steam must be running.
Steam must be running and you must have an active internet connection.
Launch steam with administrator privileges.
For all of you who didnt found the answer of the problem.
Because i remember trying to use it a couple years ago to no use.
Thanks torque for the tip.
If the issue is with your computer or a laptop you should try using restoro which can scan the repositories and replace corrupt and missing files.
If steam is set to auto launch with windows make sure the exe is set.
We actually played and after we disconnected from last killing floor session i couldnt start up even if it was just directly afterwards when i went back to the mainmenu.
Survive long enough to cleanse the area of the failed experiments.
If this does not help you may need to try a manual steam file refresh.
Killing floor is a co op survival horror fps set in the devastated cities and countryside of england after a series of cloning experiments for the military goes horribly wrong.
And to be honest i was surprised the backup system of steam actualy worked for the most part.
Set the steam exe or shortcut to launch as an administrator and restart steam.
I want to show you how i fixed the steam problem steam must be running to play this game.