Game Locks Up At Server Browser / No Servers Displayed / Failed to Join Server / Connection To Host Lost

If one of our games is

  • Freezing when you select the server browser
  • Or no servers are being displayed
  • Or you receive errors trying to join any server
  • Or it appears your internet has stopped completely (both in or out of game)
  • You join the game but shortly afterward are kicked (or appear to be in an empty play environment by yourself or other players have frozen)

It is highly likely that security software is blocking/freezing the game. Make sure the game is on any allowed/ignore list in any such software. If it already is, try removing it and re-adding it.

Alternatively this can happen when a router has decided it is being attacked with a packet flood (this can be triggered by the master server giving it too many IP's in response to a server query). In this case we recommend:

  • You limit your filter options both in the game (KF 2)
  • You limit your filter options in Steam

To limit your Steam filter options

  • Go to Steam Settings
  • Choose the In-Game Tab
  • Select the In Game Server Browser Max Pings Per Minute setting and lower it

If none of the above work you can also attempt to change your connection to the Steam Master Server:

  • Go to your Steam install location
    • Rename config to config1
    • Rename steamapps to stemapps1
    • Rename userdata to userdata1
    • Delete everything except these folders and Steam.exe
    • Run Steam.exe and log into Steam
    • Close Steam
    • Open config1/config.vdf and config/config.vdf
    • Copy the "apps" key from config1 to config. WARNING: Make sure not to delete braces ({}) that do not match "apps" or this will fail
    • Optionally: Move every other file from config1 to config that does not have a new matching file in Steam
    • Delete the new steamapps and userdata
    • Rename steamapps1 to steamapps
    • Rename userdata1 to userdata
    • Start Steam and delete config1 if it starts successfully


In some rare cases the router itself is blocking connections either at the time of connection or shortly after, which can look like randomly being kicked from a game server. You can test this by bypassing your router and seeing if this behavior continues. If the router is the culprit here, make sure you have the latest firmware/software updates for your router and contact their support team.