Triple Penetration achievement in Atomic Heart

I found the Railgun blueprint under the first room turning puzzle in the VDNH Exhibition complex. Once you own the blueprint head to a crafting station and get the Railgun crafted. Unlike other weapons the Railgun will need 1x Neuromodule which only drops from boss fights. You'll need to kill Hedgie or Belyash to aquire one. With the Railgun in hand head out and lure 3-4 enemies together and run backwards until they start to line up. Fire the Railgun through them all and the achievement should pop. I did this with mutants due to where I was. But you could quite easily do this with any of the other mob types.

If anyone has spotted the Railgun blueprint elsewhere please let me know in the comments:

Blueprint Locations:

Under the first room turning puzzle in the VDNH Exhibition complex (Lordacris).
On the dock where you first activated the Hawk to get into Hedgie's arena (Nesmaster).

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26 Feb 2023
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Location of RAILGUN blueprint (this time):

On the map, east side, inside the circle with testing ground 2 and PLANT 01. Directly north of Plant 01, near the center of the circle, there's a save house. Walk out of the save house; there's a bus stop in front of you and a lake on the left with a dock.
There's a rocky cliff with houses on top in front of you. The house nearest the point of the ricky cliff (not the shed) has a yellow chest on top with the RAILGUN blueprint. Climb some hay bails to get on the roof.

That's where I found the RAILGUN blueprint today.

Note: Blueprint locations may be random, or they change location everytime you quit out of the game. I just wanted to share where I found it in case it helps. Good luck to us all. These achievements are annoying.

Posted by E vee dub On 26 Feb at 14:30

Thanks E vee! So that gold chest gave me a blueprint and also the chest actually in that very house. So 2 blueprints :) Still no railgun though ffs

Also if you're having trouble getting onto the house, aim slightly left as you jump up.

Something interesting happened also, when I reloaded my save and regrabbed them in the opposite order it still dished out the blueprints in the order I recieved before. So perhaps you may just a preset number of blueprint chests before the game will give you the railgun and this changes if you reload the game/create new game.

Posted by Games Master On 26 Feb at 14:56

Yes that may be true, that the railgun blueprint only appears after a certain number of chests have been searched. I had explored a lot and scrounged for materials, but hadn't progressed far in the story. Just defeated Belyash. The railgun was the last blueprint I needed for craftable weapons.

So let's all keep searching. Ugh! Haha.

Posted by E vee dub On 26 Feb at 17:50

Well after giving up searching and progressing the story I finally got the railgun! It was in a gold chest in the Pavlov Complex. From the start I went all the way down the stairs and followed the linear path to a bathroom with the chest and a chirper in the toilet next to it. Yay lol

Posted by Games Master On 26 Feb at 17:56

For whatever reason, I literally never was able to obtain the final material I needed to craft the railgun. Enemies just never seemed to drop the neuromod crafting material, even ones that were supposed to.

Posted by SquashyButton On 27 Feb at 01:58

SquashyButton you probably played pre-patch, I had the same issue where I didn't get last 3 blueprints when finished game, after latest patch I played new game and got Railgun pretty early in the game, Mundfish claimed to fix the drop but only for new game unfortunately.

Posted by LV Drejz On 01 Mar at 07:12

This achievement is not working for me on Series X GamePass as of March 5, 2023. I am in the hospital and can line up five mutants and zap them all in one shot. No achievement. Tried multiple times. This game is so busted...

Posted by MisterWinkyFace On 06 Mar at 18:15

Neuromodule glitch fixed, I was able to get Lord of War and Triple Penetration finally.

Posted by Nesmaster On 10 Mar at 20:02

Not really sure about that, I think it's just randomized but also could be on a set chest loot number, idk. As soon as I had access to the surface I began playing RPG style and exploring/looting everything in sight. I did ALL of the testing grounds (except for 12) BEFORE I fought Belyash, and I had EVERY weapon unlocked. I have just now reached the Infirmary and completed all test sites, and have EVERY weapon upgraded to max and all but 2 polymer abilities maxed out (shield and Jet). I must mention I was playing on the next to highest difficulty, after Belyash I switched to Armageddon difficulty, so loot drops are much lower now. Don't skimp on farming Hives/Drones (yes I forgot the name of those little pests) for near infinite resources.

Posted by MADGamer1977 On 13 Mar at 11:31

For anyone struggling to still find the Blueprint for the Railgun - please see my comment ref “ Lord of War “ achievement.

Best spot to get this once you have it - is while crossing the bridge on the way to the hospital. Save before you cross - plenty of opportunity for 3,4,5 Mutants to line up if you pull a few from the bridge and keep walking backwards.

Posted by Alias DJA On 16 Mar at 17:05

Atomic Heart

Triple Penetration achievement in Atomic Heart

How to unlock the Triple Penetration achievement