Build Your Own NPC City

Building your own NPC city is like raising your own barbarian pet. You get to decide what level NPC city you want.


Follow these steps
Build a second city

Build a rally point

Move all of your 250 workers back to your main city with as many resources as you can carry

Abandon the city (go to your main city, click Overview, open Cities tab)
The abandoned city becomes an NPC city, ready for plunder!

Don't forget that whatever level flat you build on is what level the NPC will be (ie if you want a level 4 NPC build on a level 4 flat)