Organize such defense through which the robber will not manage to break through any. These damned treasures should not come into the hands of robbers who will start up them on achievement of own dark plans.
On each site it is possible to put a certain gun. Any of them has the cost. This black night you are expected by opposite adventures. On all district there are various sites on which it is possible to place guns. Each wave you will smooth out the district from opponents, and for the passable purpose will earn means for new guns.