Recently, there was an chemical outbreak at a local nuclear producer. Radioactive nucleus chemicals of vast kinds spewed out when there was a failure in opening a hatch in the side to test for parasites. The whole town became infected over time and before you knew it, there were aggravated zombies everywhere.[b]
Not a single being existed in the town of Albany, except for a small group of fine young men. What was known was a rare chemical disease that mutates humans into a zombie like figure that can mimic the moves of a real one.
It has been said from an unknown HQ that there are several exits around the town of Albany. You must stay hidden, quite and if possible, silent to manoeuvre yourself around the town. People will die, colleagues will die. You decide what happens and you do what is necessary to survive.
Once your reach the border of Albany, you will be forced to make a base like fortress to protect yourself from unattended zombies who wonder their way in. You have one life and one life only, remember that.
By the way, don't do it like all the other Zombie roleplays and say that "No characters aged 17 and below allowed. All the children are gone.". It's not that a virus outbreak can instantly cause all children and teenagers to mysteriously disappear from the planet. This annoys me greatly. If that's the case, humanity is alterady doomed because they won't be able to reproduce and will eventually die off by old age, or by other causes.
And you could also include a rule that prevents characters aged 14 and below to be alone in the apocalypse an they must be accompanied by an adult unless given a good reason to do so, if you wish.