Resist the Warcraft

There is a war going on between the kingdom of people and the tribes of orcs. You need to take charge of the defense. Your city is located on the very border, so the hostile soldiers will be moving right past your fortress. Your task is to make sure none of them proceeds into the depth of the country. For that purpose, you need to build various defensive structures and magical towers along the road. Your warriors will be firing at the approaching troops from the safety of these buildings and eliminating them one by one.