this only works in versus mode, when you become a tank kill Zoey, Louis, Francis, and Bill
No
No, you don't unless you want to get a campaign winning achievement.
No. Pills are probably the best way to get the unbreakable achievement.
You have to melee 10 clowns. When you hit them there will be a honk noise.
You don't, all campaigns are playable when you start Left 4 Dead 2.
No, Left 4 Dead 3 is not coming out. There is only Left 4 Dead and Left 4 Dead 2. Both fun games.
You find weapons all over in Left 4 Dead 2, there's no exact location.
No, left 4 dead will only work for left 4 dead mods.
left for dead
They (Valve and Havok) haven't announced a left 4 Dead 4, but they have announced a Left 4 Dead 3 coming out in 2011.
You can't get The Passing on Left 4 Dead 1. It is only a DLC for Left 4 Dead 2.
Not Left 4 Dead 1 or 2, but Valve and Havok announced the Haggard in Left 4 Dead 3.