Here is the full list of all 18 Villagers achievements.
One hundred townsmen, this is a city! Having them starve would be a pity.
50 houses in your settlement
Your city is expanding! Take care, more people are demanding.
More people are coming to town, now please don't let them down.
10 houses in your settlement
Tü tütü tüüütütütü, dance!
You have completed Chapter 6
You have completed Chapter 5
You have completed Chapter 4
The raiders 've been stopped, the town is saved. You are the saviour, the path is paved.
Few Villagers are better than none, though some more would also be fun.
5 houses in your settlement
You have completed Chapter 3
You have extended your Townhall
You have completed Chapter 2
You have completed Chapter 1
A baby has been delivered
Home, sweet home, your townhall is built. You better prove worthy or they will speak guilt.