The Outer Worlds: Spacer's Choice Edition

The achievement is unlocked when you equip a science weapon, crouch, and kill an unawares enemy with a sneak attack where the killing blow hits a weak spot. Ideally, you have TTD location hit effects skill unlocked—level 20 for ranged or level 40 for melee. This will allow you to see that the attacks hit a weak spot.

Nevertheless, it is not essential to have TTD location hit effects unlocked. I had a 2-handed melee skill of zero and used the 2-handed melee Prismatic Hammer Science weapon. Crouched and in TTD, I hit a sprat head on with the Prismatic Hammer and the achievement popped. You can kill any enemy for the achievement. Weak enemies make it easier and the normal non-rabid sprat is ideal. This is where I set up for the achievement:

Left of Belle’s Shells on Groundbreaker, there is a door marked Trash. I entered and went straight crouching to the left of the door facing the door I entered—not the one on the right that leads to rabid sprats. While crouching to the left of the door, I opened it. There are two sprats one to the left and the other to the right. You don’t see them until they walk to the center. As soon as one appeared, I went into TTD. While it was still unaware, I hit it in the face with the Prismatic Hammer and the achievement popped.

Sprats are prevalent throughout the game and there are quite a few other locations on Groundbreaker one might choose. I like the Trash location because, due to the closed door, the sprats can't see you coming. If you crouch before opening the door, you are already in sneak mode before you come into one another's view.

The Prismatic Hammer is the first science weapon available in the game. Land on the Groundbreaker. From your ship go straight through the security checkpoint. Turn left when you discover a workbench and an immediate right. Go through the door. Climb on some crates to your immediate left as you enter. From your elevated vantage point, go forward hugging the wall to your left. Drop through a vent hole at the far wall.

You find yourself in a room of enemies. If you have high lockpick skill (60 or better—companions Felix and Parvati each give a lockpick skill bonus); you can sneak to the door on your right and lockpick it without the enemies alerting to you. Otherwise, you will have to kill the enemies and loot the bodies to find the Repair Hangar Keycard.

Once you open the door—either by picking the lock or using the keycard—you’ll find the Prismatic Hammer in front of you in a container on a table. To its left is the Prismatic Hammer Research Terminal. Read the messages to get some info on this science weapon.

You can use the Prismatic Hammer to obtain the achievement as described above or against another enemy of your choosing. Nevertheless, it is not ideal and may take quite a few tries. If you are patient and do not require instant gratification, the best science weapons for the achievement are Special Delivery & Employee Benefits found during Peril on Gorgon and Spectrum Gatling & The Needler found during Murder on Eridanos.

These four are ranged weapons with high lethality and are easier to use for sneak attacks than melee weapons. Unlike previous ranged science weapons in the game—Shrink Ray, Gloop Gun, and Mind Control Ray—they rely on conventional targeting and damage. Thus it is easy to crouch for a sneak attack against an unaware enemy, activate TTD, target a weak spot (assuming 20 points In ranged weapons for the TTD location hit effects skill), and kill the enemy for the achievement.