In Civ 5 and before there was always a mode of gameplay called "Raging Barbarians". This is an attempt at restoring that gameplay mode. There are 30 barbarian camps avaliable and they will all try to spawn every turn, and after 5 turns they will begin to spawn a unit every other turn.

This is not balanced, and only the AI and players playing combat oriented civs will survive. So Civs like USA with their defenseive boost Gorgo with her boost to culture for defeating a unit, or Montezuma with his eagle and jaguare warriors. Most other civs struggle just to survive.

I intend to release an updated version of this with a bit more content to make it possible for not war civs to push barbarians away from their cities.