You don't, all campaigns are playable when you start Left 4 Dead 2.
yes there is many many many zombies
Left 4 Dead 2 is 2players when you are offline and 4 players when you are online it is very simple. HOPE YOU ENJOY IT!!!!!!!!!!
sadly only 2
Left 4 Dead 2!!
No
Yes there is split screen for left 4 dead 2.
left 4 dead 2 can be downloaded from Steam
yea so is left 4 dead 2
no, left 4 dead 3 would not have the same characters as in 1 or 2
Actually, Left for Dead and Left for Dead 2 are based on the remade Dawn of the Dead.
4 players can play in Left 4 Dead 2.