I’am not the best player, as I do like to suicide in the early game due to stupid mistakes, but I’ve learnt a little bit how to deal with hordes in the early game.
If, in the early game you spot a massive horde, that is lots of Zs, just run in any direction. Avoid any buildings, and run through forests (as forests destroy perfect line of sight), if you don’t see anymore Zs of that horde you were running from, you’re safe.
Now that’s just evasion tactics, for actually dealing with hordes get yourself a melee weapon that will one to two-shot zombies. A Katana is nice, a Nodachi is better, of course you could use a fire ax with some good melee/dodge skills. In addition, get some Molotov cocktails, get as much as you can make. Remember this method requires that you actually know where a horde is, a camping horde that took up residence near to your base is a prime target for this technique. So, when you do get all that’s needed, go and approach that horde when the day is getting darker and darker. You want your vision to be about 1/2 or 1/3 of what it is on a sunny day, when you do find the first zombies, attract them. Just run back a few tiles, and activate one molotov cocktail. Throw at the ground in the path of congo-line of zombies and watch them burn.
If for some reason, you start seeing zombies avoiding the death-trap-of-fire, just throw some more Molotov cocktails in their path. Obviously, if some zombies get too close, just run, as Molotov cocktails don’t help at melee range, and since darkness is coming fast, you’ll be able to retreat successfully.
The only problem with cocktails, is that even if you burn the zombies, they’ll revive. So, kill the zombies you can with Molotovs, and go and smash the zombie corpses in with whatever weapon you’re using. Repeat again and again, until the horde disappears, also if you don’t want to wait till the next day, you can go and kill zombies with your melee weapon, safely at night (if you want to deal with shockers, shocker brutes, and other nasties, use a molotov to kill’em).
Hope that helps for anyone that wants to kill off hordes.