Zombie Genocidest achievement in Left 4 Dead

Zombie Genocidest

Kill 53,595 Infected.

Zombie Genocidest0
15 guidesOnline/OfflineSingle PlayerCooperativeVersusCumulative +Time Consuming

How to unlock the Zombie Genocidest achievement

  • TuronelTuronel221,769
    01 Jan 2009 01 Jan 2009 09 Nov 2013
    329 20 154
    There is an easy way to get this:

    Start up a campaign of No Mercy on the final chapter on EXPERT. Start by killing off your AI teammates and then grab a pipe bomb. Leave the safe room run up the stairs and into the hallway. Immediately throw a pipe bomb down the hall and then run back to the safe room. After the pipe bomb blows up run back up the stairs into the hallway. Next run back to the safe room and close the door behind you.

    A boomer, smoker, and hunter should spawn. Stand a good 3 or 4 steps back from the door and rubberband your controller's left trigger down. The boomer will constantly puke on you from the stairs summoning a horde of zombies every 45 seconds. you will melee them all to death.

    I rubberbanded my controller and left it on all night and got around 30k kills in one night. Did it again the 2nd night and got the achievement. Send me a msg if you have any questions :D Happy Hunting!

    Note: Be sure to go all the way back to main menu before quitting to dashboard. There are reports of people losing kills while quitting to dashboard from the loading screen.



    *Still works as of November 2013*

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    XxLukzillaxX@HungryNic42 you should go to Settings > Power & startup > Don't turn off automatically. I also recommend you to connect your controller to a USB cable to avoid it turning off.

    I'm doing this cheevo on Crash Course Finale over the top of the other generator (by the wall) and I think this method is a lot easier than this one, because you dont depend on Boomers. There's a guide from @Cheezy Cheezes here on TA.
    Posted by XxLukzillaxX on 03 Oct 20 at 15:49
    O V LORD ALDUINStill works now in 2020
    Posted by O V LORD ALDUIN on 25 Nov 20 at 14:16
    AHTOOOLLIStill works and we are all still alive in 2021 :D
    Posted by AHTOOOLLI on 06 Jan at 00:40
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  • Cheezy CheezesCheezy Cheezes529,194
    03 Feb 2010 04 Feb 2010 12 Jan 2012
    54 5 5
    This is what i did,after the crash course dlc came out. You can also get the littlest genocide achievement on the way too. Using this method i racked up almost 2000 kills in an hour, and is i think way faster than the boomer trick in No Mercy. Just keep in mind you can only do this with the Crash Course dlc.

    1. first I signed in 2 controllers in the main menu.(my account and then you can sign in just a guest.)

    2. go into split screen versus, and choose crash course truck depot FINALE. Have your account as a survivor and the guest account as infected.

    3. First, kill all other survivors.(Note: you can do this either in the beginning of the level or wait to kill them when you reach the generator. personally i just killed them in the beginning, just to get more kills through the level and also to keep all 4 health packs by the generator at the end of the level, otherwise they will take the packs if you choose to kill them by the generator.) anyways proceed through the level as you normally would until you get to the generator. as for the other controller, DO NOT spawn as an infected. This makes things alot easier to where you can just rack up kills without worrying about specials. just let the contoller sit there beside you.

    4. Once you get to the generator and stocked up on health and ammo by the truck, only restart the generator ONCE ONLY, after that camp out at he other generator that is by the warehouse. (see video if youre unsure where this is) Now once you start the generator, 2 tanks will spawn, but do not worry, because the other controller is what is controlling the tanks. so when the spawn, grab the controller and take the tank over to where you are so that you can kill it without it attacking. you HAVE to do this rather quickly since you will notice that the controller will lose control of the tank if it does not attack within a certain time limit, but its plenty of time once you get the hang of it. do this for both tanks. after that the game will say to restart the generator. DO NOT do it. just camp at your corner and kill the horde that come to you. This is where you really rack up on kills. Each horde will consist of about 25-30 zombies and will come about every ten seconds, which gives you time to restock on ammo and health by the truck in front of you if you need. just keep doing this until you nab the achievement.

    i put up a link to a video to show what im talking about camping on top of the other generator. Notice how the zombies don't attack from your left side, They come around and try to climb the right side only. This funneling of zombies will make it easier to not get hit. Just shoot them and while you reload,melee to keep them off the generator. Once you get the hang of it, you wont need health for awhile, but if you do its in front of you by the truck.

    Saved me alot of time. hope this helps. credit for the video goes to cbkste.
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    DrahkatNo longer works, when you get to end of the level in versus mode, the generator doesn't turn off for you to restart. It stays on until the car descends and so it doesn't work.
    Posted by Drahkat on 25 Mar 17 at 00:12
    Afr Geo BlazeI do remember finding this same solution on my own, but I did it solo on easy.

    If I remember well, once you powered the generator and killed your teamates, you can use the spot to take down the hunter and smoker on your own.
    Once the boomer is down too, and if your IA teamates are dead (not just downed), the trio doesn't respawn, and the Tank doesn't appear as well, so you can melee the waves of infected without interruption after the generator is off.
    Posted by Afr Geo Blaze on 16 Jul 20 at 17:05
    XxLukzillaxXBest method! Still works on Oct 2020. But I did this on Solo. I rubberbanded my controller and left it on all day. No Smokers, Hunters or Boomers, only hordes. Thumbs up!
    Posted by XxLukzillaxX on 03 Oct 20 at 15:53
  • LAFTALAFTA547,586
    27 Feb 2011 27 Feb 2011 27 Feb 2011
    46 2 22
    This method only works if you have the Crash Course DLC (and a 2nd controller)

    This was the easiest method I found to get the kills quickly without actually having to play or tape down buttons etc... You just have to leave your xbox on for a few hours. Obviously you can also get
    Left 4 DeadThe Littlest GenocideThe The Littlest Genocide achievement in Left 4 Dead worth 68 pointsKill 5,359 Infected in the Crash Course campaign.


    Load up a versus match on the Crash Course finale, with yourself on the survivors and your second controller infected. Just rush through to the generator section with your main profile. Now you want to practice climbing the generator a few times. You just have to stand under the light bulbs and jump up the pole. Keep jumping until the bulbs/light itself is at eye level.

    Once you can confidently climb the generator, turn the power on and get climbing. Your second controller will soon be given control of the tank, ensure you walk it over to the survivors and get killed before you lose control. This will happen once more before the generator dies.

    Jump down when it's as clear as possible and re-start the generator, and get climbing again (quickly!). Now the 2nd controller will be given a tank again, this time go and kill the AI survivors, who by this stage should be in the back of the van. Once they are dead just stand the tank near enough to your main profile, so you don't lose control.

    Now the horde will just continously spawn and attempt to attack you, if you are positioned correctly ( you may have to play around with this a little bit, dead center seems to be best) they will fall over as they try and climb towards you, although you aren't killing them, they do count towards the achievement. Now just put your controller down and go to sleep or watch TV or whatever (watch the screen for a while just to make sure you aren't being hit). I'd estimate about 6 or 7 hours maximum, it may actually be much much quicker than that.
    Showing most recent comments. View all comments.
    Assassin CorvoGreat guide-Best by far! Still works as of April '15 clap
    Posted by Assassin Corvo on 11 Apr 15 at 18:13
    LAFTACheers man.
    Posted by LAFTA on 12 Apr 15 at 02:15
    PunkRawkSoldierThis works like gangbusters. Also, if you spawn as a Boomer after the Tanks, you can get into position and puke on the survivor to draw more Infected in. Just a tip, don't do this in offline system link. I lost 10,000 kills when I had signed back into Live even though I had finished the level. In any case, great guide. This is definitely the fastest way to get the kills.
    Posted by PunkRawkSoldier on 13 Aug 15 at 02:58
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