In my experienced, you can't, I assume you to Play Versus and Crete Lobby instead instead Dedicated Server.
1st of all it's left 4!!!!! Dead and you have to play versus mode in the first. in l4d2, it is versus and scavenge.
Yes, You can play versus on any campaign in both Left 4 Deads.
bad
yea if a friend is there with you get them to sign in then play together
me
i think you have to have xbox live. you go to versus mode
you get survival mode and 2 more versus maps
No I wish you could tho
You can't become a zombie, but you can play on versus and become a special infected.
To play as a zombie, you must play on the infected team on Versus mode.
It should be in the menu, but I think u need Xbox Live