XCOM 2
80 Achievements
1,520
147-185h
Enemy Adopted
Used a ruler armor ability against an alien ruler
20
6.24%
How to unlock the Enemy Adopted achievement in XCOM 2 - Definitive Guide
It is easier to perform on the Berserker Queen, due to the fact that it doesn´t dodge attacks, unlike the Viper King or the Archon King.
Missable!
You will need to kill either the Viper King (see Viper Vanquisher) or the Berserker Queen (see Berserker Breaker) for this trophy but leave one of the three alien rulers alive. Follow the directions in Now I Am The Master to obtain either the Serpent Suit or the R.A.G.E. Suit, equip it on a soldier and continue using that soldier in every mission until you encounter one of the remaining alien rulers. From there, all you need to do is use Frostbite (if you have the Serpent Suit) or Rage Strike (if you have the R.A.G.E. Suit) on the alien ruler. The trophy will pop if you successfully hit the alien ruler with the ruler armor ability.