As most of us already know, Beat the Rush (the achievement) is broken, it wont hand it over to anyone even after meeting the requirements every time several times in a row... This achievement is the only thing standing between me and getting every last achievement in L4D2, how do I get it if it's broken? I've followed every Youtube tutorial and guide, searched for hours on the forums, even hired 3 other friends to help, and none of us got it after what seems like a never-ending series of attempts...