[Merlin122]

/me begins salivating

the only way to really survive out there is if the zombies are either few and mildly far between or walked at a slow pace. And for missions, like if you hook up with scientists, they'd send you on quests for finding things like virus samples, antidotes and various random things. And if you hooked up with some kind of military group, you could go around rescueing people. Or you could even hook up with the company that created the virus and help destroy records of the virus.