I have an idea of a new zombies RPG if you have seen Shaun of the dead you would know how they go to the Winchester pub so my idea is to remake the Winchester and give the people on the inside bats ,knifes, Molotov roostertails , or a shotgun. it would be a good idea but time consuming to be good. you could make the barriear if you get out of the pub is put city buildings around it but leave space for the zombies.
below are some pics and designs that look like it.