They MAY probably help on the outcome of the issue ( You don't need to do all of them. But there is a couple of possible fix left to try. IT IS possible that may not work even after doing so. The version of your game is currently the latest 1 they released. You might want to test it out before doing everything below. READ FIRST -> Edit: CURRENTLY the game server is AVAIBLE. They will ask you to check your firewall and open specific port so you can login into that server. There is a few solution to get into the server of Vegas 2, but its such a mess. thats why people are using Tunngle because it will work on the first try and never be bothere anymore by the Failed to initialize connection. The fact that tunngle is always working its because their server is sightly stable compare to the server of Vegas 2. Its just the Ubisoft server that fail hard for Vegas 2. Online play whit other people all around the worlds. Thats the difference, but they do have both same purpose. What is the difference between the two games in the online servers 2 is a Public Server - Tunngle is a P2P Server that create a Virtual Network to emulate LAN play. L4D2 is Valve Corporation - Vegas 2 is Ubisoft Montreal - Tunngle is a VPN Software that EMULATE LAN PLAY

Left 4 dead 2 does not need Tunngle and works right away why L4D2 is not a Ubisoft game, they are different Producer. Just Vegas 2 server is a pain to get logged in Why this reinbowsix 2 works only with Tunngle servers works.

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