Zombie hordes. Vampires. Tripods. These are just some of the ways the world will end on the big screen.

Hollywood loves to wipe out all life as we know it with increasingly inventive, and terrifying, ways. "Viral" is the latest movie to raise the threat level to extinction worthy. In honor of "Viral's" upcoming release, here are ten truly unsettling end-of-the-world films guaranteed to give you all the nightmares.