Description

 Install game.
Apply razor patch (rzr-init.exe).
Extract crackfix, overwrite all.
Install l4d-stminst-x32.reg or l4d-stminst-x64.reg depending on your OS.


Create a shortcut to left4dead2.exe on desktop, add following parameters:

-console -novid +sv_allow_lobby_connect_only 0 +sv_lan 1


Server runs L4D2_LANserver.bat and sets up the game.


Clients run from game console:
connect HOSTNAME/IP


Players need to rename [sorry, the names won't hold a restart], so once:
bind F12 "setinfo name PLAYER"
and then press F12 each time you connect




Credits go to Valve, Razor1911, JIEgOKOJI, madwiggyNLD, Dog, Lonewolf22

This worked OK on my Win7 x64. Witches, cola misson, chainsaw - completed whole first act without a problem. For singleplayer just start a server and don't wait for friends :)