Left 4 Dead 2

Left 4 Dead 2

65 Achievements

1,500

25-32h

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SEPTIC TANK

SEPTIC TANK

Use a bile bomb on a Tank.

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How to unlock the SEPTIC TANK achievement in Left 4 Dead 2 - Definitive Guide

A very easy way to get this is to go into a survival match online where A tank comes out almost every 2 minutes. When the match starts and you have time to get weapons and equipment before you start the game grab a bile bomb (almost all levels have one at the starting point). From there just survive, wait 1:30-2:00 minutes for a tank to show up, let it go for a teammate (so it's distracted) then READY AIM FIRE the Bile Bomb at the tank. Achievement unlocked
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28 Dec 2009 03:52

3 Comments
Did it this way by accident. There is normally more then one tank (after about 30secs of the first one spawning) on survival vs aswell so this makes the achievement much easier.
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By no0bSter on 28 Aug 2011 18:55
That was really easy, cheers for that
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By Arador on 27 Aug 2018 04:35
well you could wait until it's been 40 seconds for a take to spawn
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By GooierChip79591 on 30 Mar 2020 20:13
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A bile bomb is the boomer vomit that is in a vile, usually dropped by CEDA Hazmat on the campaign Dead Center.
When you have a bile bomb, select it and throw it either at the tank. This achievement will unlock if the tank turns purple, meaning that he has the vomit on him.
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Not only will throwing a bile bomb on a Tank get you an achievement, but it's also a strategically smart move, because the common infected will attack the Tank for you. You'll know if you hit the mark because the Tank will be outlined in purple, just as you and your team members are when they're covered in boomer bile. Wait for the Tank to rush you, or until it's climbing a structure, which will increase your chances of hitting it.

You can find the Bile Bombs at random locations in each level, and on CEDA agents in the Dead center campaign. CEDA agents are the enemies that wear the large hazmat suits. Remember that the suit allows them to pass through flames, including those produced by molotov cocktails.
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01 Feb 2011 04:16

try this vid
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05 Feb 2010 12:15

This can easily be obtained on survival as Tanks are frequent and every match normally starts with Bile close by. Simply throw your vial of puke at a Tank at any point in the game and this achievement will pop.

Non-survival method:

I suggest starting on the campaign "Dead Center" and selectively killing the hazmat suit zombies. These zombies will drop puke vials often which you should collect and save until you encounter a Tank during the campaign. There is also an achievement tied into collecting puke from the hazmat zombies.

Left 4 Dead 2ROBBED ZOMBIEThe ROBBED ZOMBIE achievement in Left 4 Dead 2 worth 20 pointsCollect 10 vials of Boomer vomit from infected CEDA agents you have killed.
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25 Jan 2016 00:00

While running through most of the campaigns you will find Boomer bile laying around in various places. You will know when you have the bile as a bio-hazard symbol will show up where the pipe bomb/Molotov shows in your inventory.

Press when a Tank is charging around near you and throw the bile at him. Once the bile hits the achievement will pop up as the horde start to attack.

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If you find a vomit bomb, do not use it. Just go further with the company, as soon as the Tank appears, pick up the vomit bomb, come closer to him and
throw it at him.
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15 Jul 2011 12:57