Wolfenstein II: The New Colossus

During the story you can only pick one of the three new contraptions. The other 2 contraptions can you find in the districts (chapters) so that you can get all 3 contraptions after the story. The Ramshackles can you find in the New Orleans Bienville Street District in the sewer and it is unmissable.

After you pick up the Ramshackles replay the Manhattan Harbor District after you have killed the Übercommander here. At the beginning of ths district are 3 supersoldats. Kill the first one silenty activate the remaining two and run back. The supersoldat charging when enough space is between. When the supersoldat start his charge you see a fire on his back. If this happen sprint against him.

I found it easiest to do on Manhattan, Subway (Übercommander).

When you start the level, you will be on top of a subway car. Directly in front of you on the ground to the left will be two standard soldiers and one Supersoldat. I simply threw a grenade to kill the normal soldiers. Once the grenade is tossed, drop down, and head all the way to the back left. The Supersoldat should be directly in front of you. Simply wait until he charges you, and sprint to hit him head on. When he bounces back and explodes, the achievement should pop. I've noticed that if you clip him (and he does not die), the achievement will not pop.