Shooter Action Massacre

Rambo in a ghost town, its task - to destroy it appeared unidentified strange creatures. There is a suspicion that they came from another planet and specially dug in a deserted abandoned place, to assess the situation and gather strength for the attack. It is necessary to build their plans and destroy the creatures. Shoot everything that will appear in the sight glass sight, do not be afraid, and not surprised what he saw, and most importantly, if not confusing.