Home > News > Fallout New Vegas: Old World Blues – How to kill the Legendary Bloatfly!

Fallout New Vegas: Old World Blues – How to kill the Legendary Bloatfly!

Now, this caught me unaware when I first came upon it’s presence during my exploration of the Old World Blues DLC for Fallout New Vegas and boy was I in for a fight! Against probably the most dangerous boss in Fallout New Vegas, the one of a kind, Legendary Bloatfly!

First of all, you need to find it, the legendary bloatfly lies in the heart of the “Mysterious Cave” in the upper north east of the Old World Blues map, should literally be walking distance from the “Big MT North Tunnel” but incase you still can’t find it, I took a few photos of the event, below you will see the location of the “Mysterious Cave” where the bloatfly lives

Now, once your in there, your in bloatfly territory, sure, the normal ones are weak as heck, one bullet should take care of em, now, make sure you go up rather than down, for the best vantage point and soon you will come across a ledge but don’t approach it! Stay away from there or you will be in the cross-fire of the Legendary Bloatfly and believe me, it’s attacks HURT, even on Very Easy mode, it could kill you in just a few hits!

As you can see, the Legendary Bloatfly is couple of times bigger than an ordinary bloatfly and it glowing brightly so you can’t miss it, attacking it head-on is just plain suicide and it’s heavily armoured and high HP so it’s best to attack it from a distance.

Now, my theory to take it down was simple, I used the “Christine’s COS Silencer Rifle” along with one dose of Psycho, Slasher and one Stealth Boy, crouched and took loads of pot shots at the Legendary Bloatfly, if you maintain your distance, it won’t detect you allowing you to hit it freely but try to be quick as the drugs and stealth boy don’t last very long. Also use the VATS as often as possible too for good shots and high chance of critical strikes, after about several lots of sniper rifle magazines used on it, the Legendary Bloatfly should either be dead or near it so you can finish if off if it hasn’t.

The loot varies but one thing is for certain, you will get a crap load of bloatfly meat and lots of buffout and psycho which should be plenty for ya, the drain microfusion cells is probably why the Legendary Bloatfly was glowing, might have been an experiment I don’t know but it sure seems that way.

It is one of a kind type of monster, you won’t be able to find it again…. Oh and make sure you SAVE before you encounter the Legendary Bloatfly and after you have killed it coz believe me, you don’t want to face that again. It makes the Cazadors and Deathclaws seem puny in comparison!

Anyway, I hope my post helps you defeat this monstrosity!


  1. Jon
    September 24, 2011 at 17:49

    That was one hard-ass mutherfucker.

  2. January 25, 2012 at 23:20

    Well I tried your approach and sure enough it worked like a charm!!!

  3. Dmitri
    September 18, 2012 at 23:52

    Aww you will hurt the poor legendary bloatfly’s feelings and it is after all very cute same for the normal bloatfly’s.

  4. Thomas
    January 1, 2013 at 03:21

    I just used a stealthboy, sneaked up to him while he was sleeping, put on my super-heated saturnite fist, and 5 VATS-powered cockpunches later, that bug was toast.

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