Wanted Undead or Alive
If you want to interact with some specific kind of NPC, be it the uber gunsmith with the latest in shooting iron, the crazed voodoo cult leader, or just a cute barmaid to chat with when you’re back from the dusty trail, write it up on the wiki.
Don’t worry about writing the NPC’s stats, I’ll figure that out when it becomes important (or fun, whichever comes first.) Just give us a name, description, picture, personality traits, and quick bio. Don’t aim for extreme detail. Leave some stuff for me to add that you’ll discover the hard way.