Projectile Weapons
These three objects fit on your Belt with a Health enhancement item. Only one of them can be carried at a time. The projectiles are thrown and cause three interesting, and usually disgusting effects:
Molotov
Molotovs are useful for lobbing into an area you want to clear (such as a building that you suspect contains multiple foes or Special Infected), into a group of foes to set them on fire instantly, or into a location you want to prevent attacks coming from. The most strategic use is to figure out where a Horde is about to appear from (or spot it), lob the Molotov, and watch the Infected burn!
Of all three projectiles, the Molotov can be the most damaging if it impacts near your team. But it is excellent for removing Special Infected threats—watch a Witch stumble and fall, or a Tank quicken his pace. There’s no need to fire on flaming foes; they are burning to death without additional help.
Molotovs are extremely effective, unless you’re wading through parts of Swamp Fever or Hard Rain. The fire doesn’t burn well in water that isn’t very shallow. It also doesn’t affect CEDA Agents during Dead Center.
You can actively use the fire from a Molotov attack if you’re playing as Infected during Versus matches. Pull a Survivor through the flames when playing as a Smoker, steer or charge into fire with a Survivor in tow when playing as a Jockey or Charger, or rush into fire and then into a Survivor if you’re a Boomer, which forces your foes to get covered in your innards.
Pipe Bomb
The Pipe Bomb is a densely packed explosive with a short fuse and a blinking light that emits a beeping sound. When thrown, even into water, the Pipe Bomb attracts all types of Common and Uncommon Infected, with the exception of Road Crew zombies in Hard Rain. Special Infected are unaffected by the sound; use explosive objects, Molotovs, or Bile Bombs.
After 5 to 10 seconds, the Pipe Bomb detonates, and the assembled zombies are torn apart in a fountain of blood and offal. Naturally, you want the most bang for your buck, so throw these when you’re being, or are about to be, swarmed by a Horde.
Mop up any Infected that were incoming at the time of the explosion. They are likely to be temporarily stunned. Special Infected (including Tanks) can be stunned, too, providing the explosion occurs when the Tank is nearby, but this is a rare occurrence.
This weapon is incredible for clearing out Common Infected, but it can also be used as an escape tool, with the dismemberment of foes as a secondary consideration. Clear an escape route, Safe Room entrance, or other location you wish to reach, if foes are blocking your path.
Bile Bomb
Also known as Boomer Bile, Bile Vial, or Vomit Jar, this small sample of Boomer Bile is perfect for attracting a Horde of Common Infected. Lob it far from your group and once the vial lands, it shatters, creating a small green cloud of Bile. Drop it at your feet, and it acts just like a Boomer vomit—so don’t.
Bile Bombs are found on the corpses of CEDA Agents (Dead Center), or randomly scattered throughout the stages you venture through.
Bile Bombs are incredibly useful for moving Common and Uncommon Infected away from a route, a downed friend, or other location you don’t want them to be in. After 15 to 20 seconds of the group scrabbling, the Bile cloud dissipates and the Infected turn on you again.
If you haven’t escaped, slaughter them all with your favorite (and usually ranged) weapons, thrown in a Pipe Bomb, or Molotov, or set off a Fuel Can or other explosive object.
Those Survivors with accurate throwing arms should lob these at Special Infected, who are then stormed and attacked by their usually friendly Common brethren. As you can imagine, this makes fighting more dangerous foes, such as Chargers, Tanks and Witches, much less frenzied.
The only downside is that Bile doesn’t harm the Common Infected, so you must expend ammunition to rake through the assembled group.