Europa Universalis IV
373 Achievements
200+h
GOG
The Princess is in this Castle
As a country that does not start with a female heir, have a female heir while having a Castle in your capital (more advanced fort buildings do not count).
3.3%
How to unlock the The Princess is in this Castle achievement in Europa Universalis IV - Definitive Guide
The Biodreamer
TrueSteamAchievements
TrueSteamAchievements
Play a country which has fort level 2 in the capital (Most countries) without building a better fort. with some luck you will get a princess heir event rather then a regular heir. Accept her as an heir. and this achievement should unlock. Keep in mind that a princess as an heir will cause extra trouble when she in-heritage the throne, a civil war is highly likely due to low claim to the throne.
I played as Castile when I got it.
I played as Castile when I got it.