The King is Watching achievements

Achieve victory on Threat level 3

Reach +100% damage for any unit class

Have 40 units on the battlefield at once

Beat a level without taking any castle damage

Achieve victory for the first time

Kill your first enemy

Beat each boss of the Graveyard

Achieve victory on Threat level 9

Achieve victory on Threat level 5

Get rid of all the trees on a level

Beat a level without upgrading your army limit

Have at least one unit of every class on the battlefield at once