Alien: Isolation

On Mission 4, you will enter the Internal Communications as part of the story. In the back room you can find the blueprint for the EMP Mine. Once you have the blueprint, you will have to craft the item which requires:
- 25 Scrap
- 3 Charge Packs
- 2 Sensors
- 1 SCJ Injector
- 2 Bonding Agents

Craft the item whenever you have enough resources (can be done on later missions), and then use the EMP Mine on any Android in order to stun them, and unlock the achievement.

MISSION 4
After you have taken the elevator, go to the INTERNAL COMMUNICATIONS room and pick up the EMP blueprint from a small side room there.

ITEMS NEEDED:
25 Scrap

3 Charge Pack
2 Sensor
1 SCJ Injector
2 Bonding agent

If you don't have all the items you will have more than enough chances to use the EMP mine on androids in the next missions.

I didn't have enough materials for the EMP mine but got this on mission 6.

At the very start of the level you get a stun baton (cannot be missed).

Play through the level and at the end you start up 2 generators and a single robot becomes active in the room you are in. He follows a set pattern, so watch him and then follow him, and hit him from behind with the baton (equip it, hold LT to hold it in front of you and RT to thrust it at the robot). Acheivement unlocked!

Good luck!

In Mission 3, when you are looking to disable the lockdown, there's a room with a dead body next to some flamethrower fuel (always good to find, even if it's far too early). On the wall is the Flashbang v.1 blueprint.

When I got to the lobby, for whatever reason the Alien wasn't around, so I made and threw a flashbang to distract the humans (and attract the Alien). The achievement popped instantly.

It's also cheaper on materials, if you're low, and generally less useful than EMP mines (and you have to make one for another achievement anyway).

-10 Scrap
-1 Blasting Cap
-1 Bonding Agent
-1 Sensor

NB: The only reason I used the flashbang was because the Alien didn't show up at all (even after the flashbang). It's possible that this may void the "Mercy or Prudence?" achievement, so use at your own risk. (The flashbang description says it doesn't kill, but since the Alien glitched I had to reload anyway.)