The Achievment is called "Repulsed"
the description sais: "Destroy an enemy unit when it is attacking you"

Thanks for the help... but that didn´t help :S
I only got "Repulsed".

It seems to be the same problem as in "chivalry - medieval warfare". I didn´t get the tutorial-achievement either

Hi!

I just activated PanzerCorps for Steam and finished the tutorial with my old savegame.
But the Tutorial-achievment is not unlocking on steam. Is this a SteamBug, or does this happen when i play with an old savegame?