Zombies have invaded the internet. Earlier this year, two separate attempts to create user-generated narratives about outbreaks of cannibalistic living dead launched into cyberspace, but each one approached the concept from a vastly different angle. “Lost Zombies,” which started in May, asks users to submit footage with “proof” of zombie outbreaks, which will be compiled into some semblance of a documentary feature. “Nation Undead,” a more streamlined project that gives people specific guidelines but more options for the material they can submit, went live earlier this year.