Crackdown 3: Campaign
95 Achievements
1,750
26.5-33h
Secondhand Shrapnel
Use a Deadeye head shot on a Logistics robot to kill another enemy with the resulting explosion.
10
11.35%
How to unlock the Secondhand Shrapnel achievement in Crackdown 3: Campaign - Definitive Guide
At your first supply point equip the plasma rifle. When you get to the gate, run in far enough that robots start spawning in. You don't need to go far enough to activate the boss himself. Once the robots start spawning, get high, like on top of the walls. Wait for 2 robots to wander close enough to each other then take the headshot, using to aim. Achievement popped for me on my first attempt.
Deadeye is the aiming mode in the game ( Button), and you must make sure you aim to the robots head in Deadeye mode.
I recommend starting a new world with your Agent (it will keep your orbs and unlocks), and try to go for the Roxy boss mission first by attacking at least 5 Monorail Stations. Also use the PDW as that's what worked for me.
After traversing a bit through the tower, you'll come across some batches of robots spawning in, try your luck against these enemies, and if nothing happens, then leave the tower and return after about 2-5 minutes. Repeat this until hopefully luck hits and achievement pops up.
This achievement can take either minutes or hours depending on your luck, as the robots heads don't explode all the time. It took me so long I was sure it was glitched, but no I just had the worst luck.
EDIT: According to some people, you will have better luck doing this achievement on a new world if you haven't got it yet on your first world. So if you aren't having any luck and you're far through, or even done with one world, then i'd recommend starting a new one.
So I took the suggestion here and started a new world. Got to the first area that spawns the robots and went to town. Got at least 3 to explode and kill a nearby enemy - still no achievement.
So I figured I'd switch out my Conqueror for the regular ol' Pistol and see what happens. I thought I'd try to weaken an enemy so they barely had any health and see if the explosion next to this reduced-health enemy would do the trick.
To test how much damage the gun would do, I shot a single round into the leg of one of the bots that happened to be standing by itself, but it still died in one hit.
Then the achievement popped.
So after working all game to get this to pop watching headshot robots blow up and kill other enemies, I fulfilled NONE of the requirements - I shot it in the leg, it did not explode and it did not kill another enemy - and the achievement pops.
This game...
After trying a few times I have decided to quit to menu and then restarted at the latest spawn inside the tower (Before exploding the second core) and it worked on the first try.
Actually every robot is exploding now.. Go figure..
Hope it helps.
[EDIT]:
As SSmasterONE pointed out, don't forget you have to press up on the right stick to aim at the head. I used the Conqueror as my go to for this cheevo.
*Please see Roadmap as this achievement is glitchy*
The Deadeye Ability is unlocked once you reach Level 1 of the Firearms Skill.
Logistic robots are the standard infantry type with the Plasma Rifle and are found all over, but mainly in and around the Monorail strongholds or Alois Quist's Tower. You can later on spawn them when triggering a Lockdown Retaliation. When they die via a Deadeye head shot, they let out a small area of effect of explosion.
When aiming with Deadeye, shoot one of the robots legs until it has the smallest bit of health. You need to make sure they have one more shot in them because the Arc damage released from them does very little damage. Now lure or wait for another to come along close by. When one is close enough, aim and lock onto their head and keep shooting until they die and explode, hopefully hitting the other one causing the final blow.