The Boomer



The Boomer is an extremely bloated Infected that can projectile vomit at the Survivors an fairly long distances. When a survivor is hit by this vomit, they are almost completely blinded by it for a fair amount of time. That isn't the main problem, though: the vomit attracts a horde of common infected, who will only attack the vomit-covered survivor until the effects wear off. When a Boomer dies, all of the bile in it's body erupts everywhere in a wide radius, gory explosion; any survivor within the explosions radius will be covered in puke, serving the same effect as the vomit attack. Boomers can also drop from tall buildings into/onto a group of survivors, and once they impact on the streets, they "pop" exploding in the aforementioned manner. This skill serves as an effective method for ambushing the survivors, and sort of labels the boomer as a suicide bomber. As of recent game play changes, the Boomer no longer damages when detonated, but hinders survivors' sight and attracts large amounts of the infected horde. Like most other boss infected, a melee hit from the Boomer will do about 2 times the damage as a normal infected.

Extent of Mutations
The Boomer has been heavily mutated by this strain of the infection. It has become extremely bloated to the point that a slight rupture in its flesh will cause it to explode in a bloody, bile-filled explosion. It is unknown whether it was the result of the infection of an incredibly obese individual or the result of a strange strain of the infection. Massive growths have appeared along its skin, indicating that it may still be expanding. It has developed the ability to vomit from great distances, and its bile has developed the unique characteristic of attracting all nearby infected in the surrounding area, possibly through smell. Though its mentality is similar to that of the typical infected, it not distracted by such things as the flashing lights of pipe bombs nor is it apparently attracted by such things as car alarms going off.

Survivors
General:
 * Listen for the heavy breathing, gagging and belching sounds, and the music cue that heralds the presence of a boomer
 * Keep an eye out for defensive positions, that way you'll be ready when the boomer blinds you
 * Avoid being too bunched up with the other survivors (i.e.: no sense all four getting stricken at once)

Before bile spit or boomer death explosion:
 * If boomer is too close, you need to "shove" him away by meleeing (the boomer is particularly vulnerable to melees; staggering backwards several feet when hit), then run to a safe distance (approx. 25 feet away) before shooting to prevent being slimed on explosion.
 * CAUTION: you can only melee a boomer twice, a third time will cause him to blow up on you
 * Ensure that you do not allow other survivors to run up to a shoved boomer, as they will be affected by the slime if you shoot the boomer.

After getting slimed:
 * Know that a massive horde will immediately descend upon you (and any others who have been slimed)
 * Hold your fire! Since you can't see, friendly fire is the most likely result. You need to:
 * Run to a defensive position (corners and doorways are particularly good)
 * Crouch! Other survivors will be able to shoot over you safely if you do so
 * Use melee continuously to survive the incoming zombie horde
 * Once your sight starts to clear, mop up with your weapon

Helping a slimed survivor:
 * Stay close to the stricken survivor
 * Help melee the horde back or shoot if the blinded survivor stays safely crouched

Infected
While it may be difficult to be completely stealthy as a Boomer, try to hide in shadows or within crowds of Common Infected. To ensure that you slime the Survivors, vomit on them at close range, then run up to attack them so that they will be more likely to shoot you. You will explode and spread the bile within a certain radius. Your best teammates are the Special Infected.


 * First and foremost, the Boomer can only spawn one wave of infected, per survivor, at a time. Vomiting on a survivor and then exploding on the same survivor will not generate additional infected despite getting one person "twice." To generate additional infected, you must either explode on a "non-purple" survivor, or wait until all survivors are no longer glowing "purple" with bile and then strike again. Therefore; he who pukes and runs away, lives to puke another day.
 * Boomers are slow and large making them easy targets so if you manage to slime a group of survivors in a place where running away is going to take along time without cover dont be afraid of running in and clawing them. This will help to confuse the survivors as to the direction of the horde attack in the chaos.
 * The Hunter can pounce on the Survivor covered in bile to add significantly to the damage being inflicted by the Horde.
 * The Smoker can constrict a survivor not covered in bile, preventing them from aiding the slimed survivor.
 * The Tank can distract those who are not covered in bile.
 * While a Survivor is covered in bile, they cannot see the outlines of the other Survivors. While another Infected is attacking a straggler, take the opportunity to cover the other Survivors with bile.  While this may cause the Horde to spread out, it is important to impair the other Survivors' vision so that it becomes more difficult for them work together and to aim.
 * The Boomer can hide beside cars with alarms and Witches to trick Survivors into shooting them. The nearby explosion will cause the alarm to be triggered or the Witch to be startled.
 * Waiting behind doorways and in small rooms will guarantee at least one successful slime.
 * If you are stuck outdoors hide in a place where the survivors cannot see you and wait for them to be distracted by something else then run in and vomit.
 * Vomit on incapacitated survivors.
 * Vomit on survivors pinned by hunters or smokers.
 * Hunters are a great distraction and can let you close the distance without being noticed.
 * In areas with alley ways or other high roofs, jump down into the middle of the survivors. You'll either be shot in surprise or get an excellent chance to vomit on all four survivors in quick succession.
 * Don't hide right next to thin walls. Not only can survivors shoot through most of them, your amble mass may stick through, giving them a free kill. Slime sadly does not stick through. Try to hide slightly off the wall to minimize cheap kills.
 * Speaking of cheap kills, let a hunter melee you four times before you charge a survivor. They melee you, you pop.
 * When you pop, you knock people back. This includes but is not limited to survivors, infected, hunters pounced on survivors, smokers smoking survivors, and tanks. Good news is that you can knock people off cliffs with it. Bad news is that you can knock tanks off cliffs with it.

Survivors
Blind Luck You or another Survivor take no damage after being vomited on by a Boomer.

Clean Kill Shove a Boomer and then kill him without him splashing on anyone.

Outbreak (Only For PC) Catch a rare strain of infection, then pass it on to someone else.


 * The "Outbreak" achievement is unlocked by being vomited on by a player who already has that achievement.

Infected
Barf Bagged Cover four Survivors with Boomer bile at once.

Trivia

 * In the game's commentary, it's mentioned that originally the boomer's explosion simply caused damage to nearby players, and that the horde-attracting abilities were assigned to the Screamer, an infected class that was cut from the game. The Boomer was then assigned its vomit attack, and its explosion would also draw the horde.


 * The Boomer will not explode if you shoot it in the head, it merely collapses. As an interesting side note, it will still make an explosion noise after death even if it doesn't explode.