Heroes of Steel RPG

You can get all these by merging groups into a single battle, if you know where enemies are, you can lead one group into another by running away from them.

By merging groups you can get the enemy kills you need for each tier of this achievement.

Weaken the enemies with your attacks, you can see their HP and armor values and your damage range on your weapons, learn how heavy you hit them so you can estimate your blows without killing them.

As for killing them in a single turn, position yourself in the middle of the enemies so you can hit multiple of them in a single hero turn without moving (if you move you waste the AP you should be using to attack), this way, each hero might be able to kill at least 2 or 3 enemies in their turn.

This way, you can start the turn in a great position and all enemies around you 1 hit from being killed.

If you are unlucky the enemy might dodge or parry your attack, if this happens, well, tough luck.

Since the game autosaves, its not like you can reload the fight and try again, you just need to try again in another fight OR start the game again and get to the area where you can go into the caves or go north or west to fight more soldiers.

It takes around 5 minutes to get there from a new game, so it shouldnt be that difficult.

Do this on Easy mode for faster results.

These achievements DO NOT stack, so you need to have a fight with 3, 5, 8 and 10 enemies.

Here is a video of how I did the Warlords achievement: