Dwarfs!?

To fix the "Not A War hammer" achievement not being given, you need to play the Dwarfs F2P version of the game to unlock it : https://store.steampowered.com/app/213650/Dwarfs__F2P/

NOTE Achievements between both Dwarfs versions are synchronized, which means that as soon as you will open F2P, you'll get all the achievements of the paid version, and once you'll open the paid version after doing the achievement on F2P, it should unlock by itself.