The Outer Worlds: Spacer's Choice Edition

The achievement unlocks after you kill your 50th enemy with either a tossball stick or tossball blocker. The first tossball stick you are likely to find is in your spaceship, the Unreliable, on crates stacked to the right of the workbench.

There are numerous tossball sticks and blockers scattered throughout the game including a few in Edgewater, the first town you'll come across. Equip a tossball stick &/or blocker. Any enemy killed with these weapons will count towards the achievement. That includes the small sprats prevalent throughout the game and, normally, friendly NPCs.

If you have a build optimized for melee combat--high strength & dexterity especially when placing an emphasis on the 2-handed melee skill--the achievement should pop easily in normal game play regardless of difficulty. Remember to use the tossball stick or blocker whenever convenient.

If playing a character with low melee skills especially on supernova difficulty, the achievement becomes more challenging. You may want to grind specifically for the achievement.

Supernova difficulty grind with low melee skilled player-character (This approach also works for any difficulty and any character build):
--For convenience, turn on the achievement tracker. Designate this achievement as a favorite so you can track its progress.
Note 1: All kills made in sneak mode count towards the following achievement. If you want to grind for it as well, designate it as a favorite as well so you can track both it and:

--Proceed through the game until you reach the town of Edgewater. Avoid killing sprats.
--Return to your ship make sure you pick up the tossball stick to the right of the workbench. Equip it.

--Sleep till night-time. Make a manual save on the ship. Make note of it and don't over-write it until after you get the achievement.
--Return to Edgewater. Enter the main entrance and immediately exit again. This banks an auto-save.
--Double-check to make sure the tosser stick is equipped and it is the active weapon.
--Turn left as soon as you exit back out of town and circumvent the perimeter of the town counter-clockwise. Note a Spacer's Choice poster on the wall to your left that says, "Taste the Freedom" and turn the corner.
--Shortly after you turn the corner, you will come across a number of sprats. They will be asleep and are not easy to spot. The first is near the base of a big vertical pipe running down a structure to the right. The remaining four are on an approximate line between that sprite and the corner to your front left. Crouch and approach each one.
--Optionally, invoke tactical time dilation (TTD), , for extra damage and kill each sprat ().
--After you have the 5 sprites, proceed around the perimeter to the far side of town wrt the main entrance just around the corner of what is depicted as the 'junkyard' on your map. There is no need to go into the junkyard.
--Kill another 6 sleeping sprats while crouching.
--After killing as many of the 11 sprats as is convenient, reload the auto-save you banked when you entered town.
--Repeat the process killing another 11 sprats or so and reload the banked auto-save.
--Continue killing sprats around town's perimeter & reloading the banked auto-save when you run out of targets.
--Some sprats are well hidden and hard to find If you have trouble spotting them, ignore them and reload the banked auto-save before you reach the 11 count.
--Keep an eye on the tracker. When you have killed 50 sprats, the tracker will get to 100% and the achievement will pop. Similarly, once you get 50 sneak kills, the Never Seen achievement will also pop.
Note 2: If you, accidentally or intentionally, lose the banked auto-save, reload the manual save you made on the ship. You will retain all progress towards the achievement. Return to town, make another banked auto-save at the entrance by entering & immediately exiting. Resume progress towards the achievement by (sneak) killing sprats around the perimeter.

Note 3: The sprats can also be killed during the day but they will be active. They are very quick so killing them is more of a challenge and it is harder to get sneak kills.