The Spitter

The Spitter is a new Special Infected to appear in Left 4 Dead 2.

It makes a hacking sound before spitting out what appears to be a ball of mutated phlegm, which spreads out and changes from a sickish green to red. It can be assumed the phlegm has somewhat acidic properties, although it appears unable to pass through obstructions.

The Spitter's primary attack is to spit on an area near the Survivors, while it doesn't have much effect, it damages them each second while they are on it.

Trivia

 * According to GameSpy, it's graphics and design is still being worked on.