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When a Special Infected is around a corner or behind cover and cannot be shot, a Pipe Bomb can be tossed or bounced around the angle to draw them out, injure or stun them.In "Dead Center", you can get a potential double-kill with it by throwing the bomb from the lower floor and through the sky window of the lobby, you can cause the Infected on the current floor and those in the lobby to be killed by it the ones on the current floor will follow the bomb, while it will destroy the ones in the lobby. This can be used during the start of " Dead Center" or the finale of " The Parish".In Left 4 Dead 2, when a Pipe Bomb is thrown down a building or bridge, the Infected will still follow the Pipe Bomb and plunge to their deaths.Pipe Bombs are less effective in Left 4 Dead 2 since passive enemies appear to respond more slowly to their beeping and smoking, as well as the lighting, and sometimes not at all.Be mindful of your throws a poorly planned Pipe Bomb is capable of startling a witch or activating a car alarm.This can be used to stumble a Tank off a cliff, instantly killing them, or buy time when killing a Witch.Witches and Tanks can be stumbled or stunned if a Pipe Bomb explodes near them, but won't chase them.Special Infected and Uncommon Worker Infected are not attracted to Pipe Bombs.The kill radius may vary with the difficulty level.Common Infected who are not killed outright by the explosion are stunned and thus vulnerable to a follow-up attack.Enemies only respond if they are standing on the ground. They are programmed to complete their climb before turning and running towards the bomb, by which time the bomb may have exploded harmlessly. Do not throw a Pipe Bomb when a large number of enemies are climbing a fence, barrier or wall.Let your teammates know when you are going to throw a Pipe Bomb to prevent them from wasting theirs.Common Infected will run towards the first one thrown and ignore the others.
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Remember: this weapon's lethality is directly proportional to the number of enemies it can attract. Keep Pipe Bombs in reserve for dealing with large Hordes.Push them away to disengage them so they will chase after the Pipe Bomb. If the Common Infected are too close to you or your allies, they may ignore the Pipe Bomb and attack.Infected AI places higher priority on the Pipe Bomb over Survivors covered in bile, but Commons may still attack if already engaged. Deploy a Pipe Bomb to draw enemies away from a teammate who is either incapacitated or covered in Boomer bile.Apart from the Bile Bomb, the Pipe Bomb is the ideal diversionary device to deploy against the Horde during the final moments of a finale when sprinting for a rescue vehicle.
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