Easy "Fists Of Fury" achievement
Enter an empty Hordetown mode server. Start the match solo and kill the first wave of peasant bots, which will die after a single hit of your fist. Either fight the rest of them with swords and advance to get another wave of peasants and knights, or intentionally lose to the first wave's commander. There are ten minions in the first wave and eight of them are peasants that can be dispatched with one hit.