Contacting Extraterrestrial Life
Zombie Apocalypse
Earth Pole Shift
Space Colony Uprising
Artificial Intelligence
Habitat Destruction
Solar Shutdown
Unstoppable Pandemic
Super Volcano
Overpopulation
Nanontechnology Disaster
Particle Accelerator Mishap
Asteroid Impact
Divine Intervention
Solar Storm
Mega Bomb
Gamma Ray Burst
Rebooted Computer
Worldwide Famine
Genetically Modified Superhumans
Cyber Terrorism
Biotech Disaster
Climate Change
Worldwide Depression
Nuclear War