Left 4 Dead 2

Left 4 Dead 2

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ROBBED ZOMBIE

ROBBED ZOMBIE

Collect 10 vials of Boomer vomit from infected CEDA agents you have killed.

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How to unlock the ROBBED ZOMBIE achievement in Left 4 Dead 2 - Definitive Guide

This is done on the "Dead Center" campaign: Chapter 2

The easiest place to collect these is when you have to get the Cola for the GunShop owner. Instead of giving him the Cola, sit outside the store and just wait for the CEDA agents (they wear blue or yellow HAZMAT suits) to come along with the packs and packs of zombies that will pour out. You should get a CEDA agent every other crew of undead that come out looking for you; if you're lucky you will get one from every horde that comes out.

You should have the achievement in about 15-20minutes of opening the door, if not wait a little longer and it will be yours.

NOTE:This is best done on easy, no need trying to be a hero. Also if you don't see many vials don't worry, the game director is all random. It might bring 10 vials in a row or it might not bring any.
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30 Nov 2009 00:13

18 Comments
This is the perfect area for this. Took me about twenty minutes for it. Got a drop around every five or six CEDA agents!
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By Luddy420 on 14 Dec 2009 19:40
I got it just playing the dead center campaign multiple times, but this sounds like a good place for it, positive vote.
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By Quarantane on 18 Dec 2009 03:30
i did it and it took me 1 hour to get 3 pile jars?!!! i tried it on easy at the cola shop camping in the doorway on the right hand side so that if i killed a ceda agent it would drop infront of me... it took 5 DAM WAYES FOR ME TO GET JUST 1! i don't have any idea how to speed it up and after playing the campeign 5 times on easy to advanced difficulty i only have six. am i doing something wrong or does my game just hate me?
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By BloodMockngbird on 30 Dec 2009 10:14
if you have the door open and the alarm is going off,you have done everything right,its not your fault.The games director just didn't feel like being nice to you.When I did it,I had 3 jars come to me in a row,3 hordes,3 jars,then it was every other horde.I started with 2 and got the achievement in about 20mins.The game doesn't hate you,its just not being cool to you.I got 1 negative vote,looks like someone else wasn't being treated nice like aswell.
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By WifelikeDrip on 30 Dec 2009 18:10
Good guide, will try this tonight. Plus, I like the line at the end 'no need trying to be a hero'i It brought a smile to my face =)
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By GremUK on 05 Jan 2010 16:18
Yea standing just inside the door (using it as a chokepoint) is the perfect place to camp. Got this in about 30 minutes (I had slow drops too), positive vote!
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By SwervinCurvin on 20 Feb 2010 21:05
That is a good idea. Just make sure you move a control stick every minute or so, or your survivor will go idle and finish the game without you.
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By WifelikeDrip on 15 Jul 2010 00:31
I found that after a while the Director had not given me any viles in a while. I picked up the cola until I heard the next horde coming and dropped the cola, killed the Ceda agents and got more viles. I did this couple more times and I got a vile each time I dropped the cola and got my achievement.
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By dropK1CK ninJA on 16 Aug 2010 16:10
Worked for me, appreciate the solutuion
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By Not a test23 on 16 Oct 2010 16:09
The solution works, but seriously? Viles? The cheevo description tells you how to spell it - now you even have commenters copying you!
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By jburridge88 on 14 Jan 2011 06:38
Yeah, it started as a mistake I was too lazy to fix. Now it's kinda funny that other people are writing it the same way. I am going to leave it that way until the next person says something, then I will change it. And its not a cheevo, it's an achievement.

It's kinda like the placebo affect, you say something is what its not, and people believe it.
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By WifelikeDrip on 14 Jan 2011 23:47
I agree with dropkick ninja. I didn't get a vile for about a half an hour (without touching the cola) after a saw his comment, I tried it and there were 2 ceda agents that wave and they both dropped a vile. Maybe it's coincidence but the viles dropped seemed more frequent while holding the cola.
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By BJFindlay on 25 Mar 2011 17:16
In more than 30 minutes of playing this campaign and killing tons of CEDA agent, I only got 2 ... viles... and they were at the same time. The game isn't cool to me. But I know this solution makes sense, it must be a very good place to get it... normally.
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By Tanelorn82 on 21 May 2011 13:22
I got the first 4 in about 30 mins, doing this method. I then went into the back of the store near the coke, crouched, let my team kill them all got 7 viles in 10 minutes.
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By DarkSovereignX on 04 Feb 2012 22:55
perfect solution!
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By Shadow XBL on 26 May 2013 16:53
Great solution but damn that drop rate.
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By Ethigy on 18 Jul 2021 23:33
Great location for this, took me about 20 mins camping in the back of the store
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By Pathos VI on 23 Feb 2024 06:50
Another way to do this is after you grab the cola and run back to the guy's door, just drop the cola anywhere and go down stairs in the gun room and on the right hand side there is 3 creates on top of each other. Stand on the create and go watch TV or clean your room, pat your cat... What ever you want to do for 10 mins - then come back and you should have about 4-5 viles on the ground. Pick them up and throw them then go back on the create and do the same thing. This method is good if your lazy and don't wanna wait, The zombies shouldn't kill you, they hit you a little bit but not much at all, you would have to be afk for about an hour to die.
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By XxSpazemxX on 13 Jul 2010 11:59
View all 18 comments Show less comments
This achievement must be done in the Dead Center campaign. Occasionally you will come across CEDA agents (men in big green / yellow suits). After you kill them, sometimes they will drop a vile of Boomer vomit. Do this 10 times and the achievement is yours.

Note: You do not have to be the one to kill the CEDA agents. If a teammate kills them, picking up the vile still counts.
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18 Nov 2009 22:55

4 Comments
Is there a special way you have to kill them because every time I kill one nothing falls out
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By o my jew on 27 Nov 2009 19:26
It's a hit or miss. Sometimes they drop it, sometimes they don't. If they have it, you'll see it on their belt while they're walking around. Same with the nightsticks on the SWAT infected.
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By Shock O Rama on 28 Nov 2009 21:42
Edit your solution: you're totally wrong. you do not have to kill the CEDA agents yourself for it to count towards the achievement. I tried it, and it added towards my 10.
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By JediJohnny7 on 30 Nov 2009 10:13
Yeah, you can see the guys carrying the vial.

Also I would like to not that they are not always in green suits, sometimes they are yellow.

And I also found this to be easiest on the first chapter as for me it seemed there were more of them in this chapter than any other.

Nice guide though, positive vote.
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By Quarantane on 18 Dec 2009 03:28
View all 4 comments Show less comments
I actually just found a way to idle this on accident. Not that it's really needed. I was doing as solutions stated above, Dead Center - Chapter 2 (Streets). Play up to when you have to retrieve the cola, open the store door, but don't go in, just stand outside and kill the waves of zombies, group with your AI, and they will protect you. I was playing Campaign, instead of Singleplayer, so when I paused to go do something else, I was expecting to come back dead, but my health was still in green, and saw like 5 Boomer Bile containers lying around on the ground, I went around and picked one up, threw it, and picked up the next, etc. I went to check my achievement progress and I had went from 0/10 to 5/10 during the 10 min. period I was gone. Then I healed myself, and idled the rest.
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23 Sep 2012 00:35

1 Comment
Always nice to be able to idle with silly collective achievements like this. Thanks for the tip!
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By Profilia on 17 Aug 2014 01:29
CEDA agents are the zombies wearing full body suits. If one drops boomer bile when it dies, pick it up. CEDA zombies only appear in the first 2 chapters of Dead Center, so keep replaying them until you get 10 boomer bile drops.
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23 Nov 2009 00:59

Replay the beggining of the Dead Center campaign making sure to kill and search the zombies in the hazmat suits. Go through every room in the fire area to look for these guys. Not everyone of them has a boom vial on them. Once you go outside, it is best to restart the campaign since there are less and less of them throughout the campaign. Send me a friend request over live if you need help.
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14 Mar 2010 22:40

If you've got the Sacrifice and 5-10 minutes you can get this easy. Load up the first chapter of The Sacrifice campaign and progress right until you reach the area where you need to release the tank from the train car. Along the way if you happen to find a bile jar, keep it. There should be a bunch of CEDA zombies in the area already, all you need to start is one jar of bile. Toss said bile jar on the grassy area right below the ledge where the train car is and a mini horde will climb over the train car, 40-60% of which are CEDA zombies. There should be at least one bile jar per horde, I've seen up to four in one horde. Repeat the process of throwing bile, killing horde, and picking up bile and you should have the achievement in no time. Should you run out of bile, you can try to summon a few more zombies using pipe bombs or just reload the map. Difficulty shouldn't matter, though I did this on normal.
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08 Jul 2011 07:26

As said before the area to do this is definitely on chapter 2 (streets) on the dead center campaign. What you may not have known however is that the collecting is cumulative. For example i only collected two vials when going for this achievement which means i must have had 8 previously collected. Hope this helps.
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11 Dec 2013 14:54

Always look for the Hazmat Infected while running through Dead Center. As soon as you see them check around their bodies once you kill them to find Boomer bile. They don't always have these canisters so this may take several attempts to do.

Once you find the bile pick it up and either user it, or you can hold onto it and wait until you find another Infected with more bile. You can then use the bile you have and pick up the freshly dropped bile.

Repeat this 10 times for the achievement to unlock.

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In the "Extinct Center" campaign, you will come across infected people in bio-suits on your way. Some of them you will notice a vomit bomb on their belt after killing
such an infected person needs to pick up this bomb. Pick up a vomit bomb from ten infected people and you will receive the achievement.
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15 Jul 2011 12:58

1 Comment
To get achievements faster, there is one way that I used. In the first chapter, when the guard asks you to go to the store for a cola, and when you open the store, the siren will start screeching and the infected will run towards you in WAVES. (Measured by waves)!!! I did this, took the bottles, threw them at the guard's door (without giving them back yet), went downstairs and began to sit and wait. There will be endlessly infected people, in waves, and among them there will be zombies in suits. Kill and loot.
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By Doomec on 26 Dec 2012 00:28