Anyone pissed that there's no server browser as in, well, any other Valve game? Have no fear, apparently the creators realised how ridiculous this was and even left the server browser file there for us to use.
Go to the Steam folder and click your way to Steamsteamappscommonleft 4 deadleft4deadresourceUIL4D360UI. There are two files named 'MainMenu.res' and 'mainmenu_serverbrowser.res'. Cut the MainMenu.res file out and store it somewhere else in case you want to go back for some reason, and rename the server browser file to MainMenu.res. Yay, server browser and favorites.
+rep for u sir
it worked flawlessly