Pit People
27 Achievements
1,500
20-25h
Xbox One
Xbox Series
Shadows And Dust
Kill 300 enemies
30
5.54%
How to unlock the Shadows And Dust achievement in Pit People - Definitive Guide
This popped retroactively for me when I loaded up the game post-update. You'll probably kill 300 enemies in the process of getting all the achievements (especially with the update) so I don't think you'll need extra grinding, but you can just run around the world map and slaughter non-elites until you get this if you need to.
This is cumulative between all your units and all game modes (story, arena, PVP). You should have no issue getting this while working on all the other achievements.