[quote=@BangoSkank]
Zombie RPs always seem so easy but it's hard to make them last
[/quote]

Besides player activity and other things of note, I think zombie RPs struggle because of two main reasons splitting them into various little groups, cliques or communities.

First, you have the zombies themselves. Some people like slow TWD types or fast WWZ-like zombies. Others prefer the TLOU or L4D "infected". Just that splinters the potential playerbase since one might prefer certain kinds. For awhile, and still partly, I used to dislike the concept of fast, sprinter-zombies, preffering only the slow ones or the mutated infected types like in Dying Light or similar media.

Then, you have the tone itself. Are you going to go for a more rugged, survival horror approach, wherein people have to scavenge heavily and zombies are incredibly dangeous? Or are you going to go for a more guns blazing approach, such as what we see in the Zombieland movies? Personally, the thrill of a zombie story for me is more of the former.

Regardless of what you choose in the end, it'll likely affect your player pool/potential applicants, making it more difficult to keep a RP afloat.