Nuclear war, zombie outbreaks, meteor strikes, economic collapse, alien invasion, no matter how it happens an apocalypse makes for a unique and engaging setting to run a campaign in, even for a jaded GM.
Here’s a few quick tips that can make a good zombie or other post apocalypse game a great one, and keep the group coming back (from the dead?) for more.
There was a Beggar he was starring at me as if he is going to kill me but as I get nearer and nearer I found out his resisting something I don't know what but his really resisting something something un explainable and then I saw a knife on his hand and I though his going to kill me but when he raises the knife and then he stoped and said "run child" that I knew his resisting himself' his blood thirsty self, to stop, to stop killing people at the other day when I go were he was I saw him lying DEAD! and I saw a knife stabed strait throught the heart and that knife was the one he tried to stab on me last day and I knew he KILLED HIMSELF because its the only way to get out of his problems...