Alien V.S. Predator

An alien from another world, has come to exterminate a major problem. For many years, they have used earth as its battle field for warriors to prove themselves worthy of their name. They fought against horrific creatures that they brought to earth on their own. But sadly one day, a aircraft of theirs that carried these terrible monsters, crashed in the backyard of a friendly family. Leaving no know survivors behind, or so they thought.